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Exhibit 4.12    
    


EXECUTION COPY 


$155,000,000

CONCENTRA OPERATING CORPORATION

91/8% Senior Subordinated Notes due 2012  


REGISTRATION RIGHTS AGREEMENT


        May 25,
2004 


CREDIT
SUISSE FIRST BOSTON LLC

CITIGROUP GLOBAL MARKETS INC.

J. P. MORGAN SECURITIES INC.

DEUTSCHE BANK SECURITIES INC. JEFFERIES & COMPANY, INC.

c/o Credit Suisse First Boston LLC

        Eleven Madison Avenue

        New York, New York 10010-3629



Dear
Sirs: 


        Concentra
Operating Corporation, a Nevada corporation (the "Issuer"), proposes to issue and sell to Credit Suisse First Boston LLC, Citigroup Global Markets Inc., Deutsche Bank
Securities, Inc., Jefferies & Company, Inc. and J. P. Morgan Securities Inc. (collectively, the "Initial Purchasers"), upon the terms set forth in a purchase agreement of
even date herewith (the "Purchase Agreement"), $155,000,000 aggregate principal amount of its 91/8% Senior Subordinated Notes due 2012 (the "Initial Securities") to be unconditionally
guaranteed by each of the Subsidiaries listed on Schedule B to the Purchase Agreement (the "Guarantors and, together with the Issuer, the "Company"). The Initial Securities will be issued
pursuant to an Indenture, dated as of June 8, 2004, (the "Indenture") among the Company, the Guarantors and The Bank of New York (the "Trustee"). As an inducement to the Initial Purchasers, the
Company agrees with the Initial Purchasers, for the benefit of the holders of the Initial Securities (including, without limitation, the Initial Purchasers), the Exchange Securities (as defined below)
and the Private Exchange Securities (as defined below) (collectively the "Holders"), as follows: 


        1.     Registered Exchange Offer. The Company shall, at its own cost, prepare and, not later than 90 days after (or if the
90th day is not a business day, the first business day thereafter) the date of original issue of the Initial Securities (the "Issue Date"), file with the Securities and Exchange Commission (the
"Commission") a registration statement (the "Exchange Offer Registration Statement") on an appropriate form under the Securities Act of 1933, as amended (the "Securities Act"), with respect to a
proposed offer (the "Registered Exchange Offer") to the Holders of Transfer Restricted Securities (as defined in Section 6 hereof), who are not prohibited by any law or policy of the Commission
from participating in the Registered Exchange Offer, to issue and deliver to such Holders, in exchange for the Initial Securities, a like aggregate principal amount of debt securities (the "Exchange
Securities") of the Company issued under the Indenture and identical in all material respects to the Initial Securities (except for the transfer restrictions relating to the Initial Securities and the
provisions relating to the matters described in Section 6 hereof) that would be registered under the Securities Act. The Company shall use its reasonable best efforts to cause such Exchange
Offer Registration Statement to become effective under the Securities Act within 180 days (or if the 180th day is not a business day, the first business day thereafter) after the Issue Date of
the Initial Securities and shall keep the Exchange Offer Registration Statement effective for not less than 30 days (or longer, if required by applicable law) after the date notice of the
Registered Exchange Offer is mailed to the Holders (such period being called the "Exchange Offer Registration Period"). 







 



        If
the Company effects the Registered Exchange Offer, the Company will be entitled to close the Registered Exchange Offer 40 days after the commencement thereof provided that the Company
has accepted all the Initial Securities theretofore validly tendered in accordance with the terms of the Registered Exchange Offer. 



        Following
the declaration of the effectiveness of the Exchange Offer Registration Statement, the Company shall promptly commence the Registered Exchange Offer, it being the objective of
such Registered Exchange Offer to enable each Holder of Transfer Restricted Securities (as defined in Section 6 hereof) electing to exchange the Initial Securities for Exchange Securities
(assuming that such Holder is not an affiliate of the Company within the meaning of the Securities Act, acquires the Exchange Securities in the ordinary course of such Holder's business and has no
arrangements with any person to participate in the distribution of the Exchange Securities and is not prohibited by any law or policy of the Commission from participating in the Registered Exchange
Offer) to trade such Exchange Securities from and after their receipt without any limitations or restrictions under the Securities Act and without material restrictions under the securities laws of
the several states of the United States. 


        The
Company acknowledges that, pursuant to current interpretations by the Commission's staff of Section 5 of the Securities Act, in the absence of an applicable exemption
therefrom, (i) each Holder which is a broker-dealer electing to exchange Securities, acquired for its own account as a result of market making activities or other trading activities, for
Exchange Securities (an "Exchanging Dealer"), is required to deliver a prospectus containing the information set forth in (a) Annex A hereto on the cover, (b) Annex B hereto in the
"Exchange Offer Procedures" section and the "Purpose of the Exchange Offer" section, and (c) Annex C hereto in the "Plan of Distribution" section of such prospectus in connection with a sale of
any such Exchange Securities received by such Exchanging Dealer pursuant to the Registered Exchange Offer and (ii) an Initial Purchaser that elects to sell Exchange Securities acquired in
exchange for Initial Securities constituting any portion of an unsold allotment is required to deliver a prospectus containing the information required by Items 507 or 508 of
Regulation S-K under the Securities Act, as applicable, in connection with such sale. 


        The
Company shall use its reasonable best efforts to keep the Exchange Offer Registration Statement effective and to amend and supplement the prospectus contained therein, in order to
permit such prospectus to be lawfully delivered by all persons subject to the prospectus delivery requirements of the Securities Act for such period of time as such persons must comply with such
requirements in order to resell the Exchange Securities; provided, however, that (i) in the case where such prospectus and any amendment or supplement thereto must be delivered by an Exchanging
Dealer or an Initial Purchaser, such period shall be the lesser of 180 days and the date on which all Exchanging Dealers and the Initial Purchasers have sold all Exchange Securities held by
them (unless such period is extended pursuant to Section 3(j) below) and (ii) the Company shall make such prospectus and any amendment or supplement thereto, available to any
broker-dealer for use in connection with any resale of any Exchange Securities for a period of not less than 90 days after the consummation of the Registered Exchange Offer. 



        If,
upon consummation of the Registered Exchange Offer, any Initial Purchaser holds Initial Securities acquired by it as part of its initial distribution, the Company, simultaneously
with the delivery of the Exchange Securities pursuant to the Registered Exchange Offer, shall issue and deliver to such Initial Purchaser upon the written request of such Initial Purchaser, in
exchange (the "Private Exchange") for the Initial Securities held by such Initial Purchaser, a like principal amount of debt securities of the Company issued under the Indenture and identical in all
material respects (including the existence of restrictions on transfer under the Securities Act and the securities laws of the several states of the United States, but excluding provisions relating to
the matters described in Section 6 hereof) to the Initial Securities (the "Private Exchange Securities"). The Initial Securities, the Exchange Securities and the Private Exchange Securities are
herein collectively called the "Securities". 


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        In
connection with the Registered Exchange Offer, the Company shall: 



        (a)   mail
to each Holder a copy of the prospectus forming part of the Exchange Offer Registration Statement, together with an appropriate letter of transmittal and related
documents; 


        (b)   keep
the Registered Exchange Offer open for not less than 30 days (or longer, if required by applicable law) after the date notice thereof is mailed to the
Holders; 


        (c)   utilize
the services of a depositary for the Registered Exchange Offer with an address in the Borough of Manhattan, The City of New York, which may be the Trustee or an
affiliate of the Trustee; 


        (d)   permit
Holders to withdraw tendered Securities at any time prior to the close of business, New York time, on the last business day on which the Registered Exchange Offer
shall remain open; and 


        (e)   otherwise
comply with all applicable laws. 




        As
soon as practicable after the close of the Registered Exchange Offer or the Private Exchange, as the case may be, the Company shall: 



        (x)   accept
for exchange all the Securities validly tendered and not withdrawn pursuant to the Registered Exchange Offer and the Private Exchange; 


        (y)   deliver
to the Trustee for cancellation all the Initial Securities so accepted for exchange; and 


        (z)   cause
the Trustee to authenticate and deliver promptly to each Holder of the Initial Securities, Exchange Securities or Private Exchange Securities, as the case may be,
equal in principal amount to the Initial Securities of such Holder so accepted for exchange. 




        The
Indenture will provide that the Exchange Securities will not be subject to the transfer restrictions set forth in the Indenture and that all the Securities will vote and consent
together on all matters as one class and that none of the Securities will have the right to vote or consent as a class separate from one another on any matter. 


        Interest
on each Exchange Security and Private Exchange Security issued pursuant to the Registered Exchange Offer and in the Private Exchange will accrue from the last interest payment
date on which interest was paid on the Initial Securities surrendered in exchange therefor or, if no interest has been paid on the Initial Securities, from the date of original issue of the Initial
Securities. 


        Each
Holder participating in the Registered Exchange Offer shall be required to represent to the Company that at the time of the consummation of the Registered Exchange Offer
(i) any Exchange Securities received by such Holder will be acquired in the ordinary course of business, (ii) such Holder will have no arrangements or understanding with any person to
participate in the distribution of the Securities or the Exchange Securities within the meaning of the Securities Act, (iii) such Holder is not an "affiliate," as defined in Rule 405 of
the Securities Act, of the Company or if it is an affiliate, such Holder will comply with the registration and prospectus delivery requirements of the Securities Act to the extent applicable,
(iv) if such Holder is not a broker-dealer, that it is not engaged in, and does not intend to engage in, the distribution of the Exchange Securities and (v) if such Holder is a broker-
dealer, that it will receive Exchange Securities for its own account in exchange for Initial Securities that were acquired as a result of market-making activities or other trading activities and that
it will be required to acknowledge that it will deliver a prospectus in connection with any resale of such Exchange Securities. 


        Notwithstanding
any other provisions hereof, the Company will ensure that (i) any Exchange Offer Registration Statement and any amendment thereto and any prospectus forming part
thereof and any 


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supplement
thereto comply in all material respects with the Securities Act and the rules and regulations thereunder, (ii) any Exchange Offer Registration Statement and any amendment thereto do
not, when they become effective, contain an untrue statement of a material fact or omit to state a material fact required to be stated therein or necessary to make the statements therein not
misleading and (iii) any prospectus forming part of any Exchange Offer Registration Statement, and any supplement to such prospectus, do not include an untrue statement of a material fact or
omit to state a material fact required to be stated therein or necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading. 


        2.     Shelf Registration. If, (i) because of any change in law or in applicable interpretations thereof by the staff of
the Commission, the Company is not permitted to effect a Registered Exchange Offer, as contemplated by Section 1 hereof, (ii) the Registered Exchange Offer is not consummated within
220 days of the Issue Date, (iii) any Initial Purchaser shall notify the Company following consummation of the Registered Exchange Offer that the Initial Securities (or the Private
Exchange Securities) held by it are not eligible to be exchanged for Exchange Securities in the Registered Exchange Offer; or (iv) any Holder (other than an Exchanging Dealer) notifies the
Company in writing that it is prohibited by law or SEC policy from participating in the Registered Exchange Offer or may not resell the Exchange Notes acquired by it in the Registered Exchange Offer
to the public without delivering a prospectus, and the prospectus contained in the Exchange Offer Registration Statement is not appropriate or available for such resales by it, the Company shall take
the following actions: 



        (a)   The
Company shall, at its cost, as promptly as practicable (but in no event more than 60 days after so required or requested pursuant to this Section 2)
file with the Commission a registration statement (the "Shelf Registration Statement" and, together with the Exchange Offer Registration Statement, a "Registration Statement") on an appropriate form
under the Securities Act relating to the offer and sale of the Transfer Restricted Securities (as defined in Section 6 hereof) by the Holders thereof from time to time in accordance with the
methods of distribution set forth in the Shelf Registration Statement and Rule 415 under the Securities Act (hereinafter, the "Shelf Registration"); provided, however, that no Holder (other
than an Initial Purchaser) shall be entitled to have the Securities held by it covered by such Shelf Registration Statement unless such Holder agrees in writing to be bound by all the provisions of
this Agreement applicable to such Holder. 


        (b)   The
Company shall (x) in the case of clause (i) above, use its reasonable best efforts to cause the Shelf Registration Statement to be declared effective
under the Securities Act on or prior to the 180th day after the Issue Date and (y) in the case of clause (ii), (iii) or (iv) above, use its reasonable best efforts to cause
the Shelf Registration Statement to be declared effective under the Securities Act on or prior to the 60th day after the date on which the Shelf Registration Statement is required to be filed. 


        (c)   The
Company shall use its reasonable best efforts to keep the Shelf Registration Statement continuously effective in order to permit the prospectus included therein to
be lawfully delivered by the Holders of the relevant Securities, for a period of two years (or for such longer period if extended pursuant to Section 3(j) below) from the Issue Date or such
shorter period that will terminate when all the Securities covered by the Shelf Registration Statement (i) have been sold pursuant thereto or (ii) are no longer restricted securities (as
defined in Rule 144 under the Securities Act, or any successor rule thereof). The Company shall be deemed not to have used its reasonable best efforts to keep the Shelf Registration Statement
effective during the requisite period if it voluntarily takes any action that would result in Holders of Securities covered thereby not being able to offer and sell such Securities during that period,
unless such action is required by applicable law. 



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        (d)   Notwithstanding
any other provisions of this Agreement to the contrary, the Company shall cause the Shelf Registration Statement and the related prospectus and any
amendment or supplement thereto, as of the effective date of the Shelf Registration Statement, amendment or supplement, (i) to comply in all material respects with the applicable requirements
of the Securities Act and the rules and regulations thereunder and (ii) not to contain any untrue statement of a material fact or omit to state a material fact required to be stated therein or
necessary in order to make the statements therein, in light of the circumstances under which they were made, not misleading. 




        3.     Registration Procedures. In connection with any Shelf Registration contemplated by Section 2 hereof and, to the
extent applicable, any Registered Exchange Offer contemplated by Section 1 hereof, the following provisions shall apply: 



        (a)   The
Company shall (i) furnish to each Initial Purchaser, prior to the filing thereof with the Commission, a copy of the Registration Statement and each amendment
thereof and each supplement, if any, to the prospectus included therein and, in the event that an Initial Purchaser (with respect to any portion of an unsold allotment from the original offering) is
participating in the Registered Exchange Offer or the Shelf Registration Statement, the Company shall use its reasonable best efforts to reflect in each such document, when so filed with the
Commission, such comments as such Initial Purchaser reasonably may propose; (ii) include the information set forth in Annex A hereto on the cover, in Annex B hereto in the "Exchange Offer
Procedures" section and the "Purpose of the Exchange Offer" section and in Annex C hereto in the "Plan of Distribution" section of the prospectus forming a part of the Exchange Offer Registration
Statement and include the information set forth in Annex D hereto in the Letter of Transmittal delivered pursuant to the Registered Exchange Offer; (iii) if requested by an Initial Purchaser
within a reasonable time after receipt of any such document, include the information required by Items 507 or 508 of Regulation S-K under the Securities Act, as applicable, in the
prospectus forming a part of the Exchange Offer Registration Statement; (iv) include within the prospectus contained in the Exchange Offer Registration Statement a section entitled "Plan of
Distribution," reasonably acceptable to the Initial Purchasers, which shall contain a summary statement of the positions taken or policies made by the staff of the Commission with respect to the
potential "underwriter" status of any broker-dealer that is the beneficial owner (as defined in Rule 13d-3 under the Securities Exchange Act of 1934, as amended (the "Exchange
Act")) of Exchange Securities received by such broker-dealer in the Registered Exchange
Offer (a "Participating Broker-Dealer"), whether such positions or policies have been publicly disseminated by the staff of the Commission or such positions or policies, in the reasonable judgment of
the Initial Purchasers based upon advice of counsel (which may be in-house counsel), represent the prevailing views of the staff of the Commission; and (v) in the case of a Shelf
Registration Statement, include the names of the Holders, who propose to sell Securities pursuant to the Shelf Registration Statement, as selling securityholders; provided, however, that each such
Holder shall have furnished to the Company on a timely basis such information regarding the Holder as the Company may require pursuant to Section 3(n) hereof. 


        (b)   The
Company shall give written notice to the Initial Purchasers, the Holders of the Securities proposed to be sold under the Shelf Registration Statement and any
Participating Broker-Dealer from whom the Company has received prior written notice that it will be a Participating Broker-Dealer in the Registered Exchange Offer (which notice pursuant to clauses
(ii)-(v) hereof shall be accompanied by an instruction to suspend the use of the prospectus until the requisite changes have been made): 



        (i)    when
the Registration Statement or any amendment thereto has been filed with the Commission and when the Registration Statement or any post-effective
amendment thereto has become effective; 




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        (ii)   of
any request by the Commission for amendments or supplements to the Registration Statement or the prospectus included therein or for additional information; 



        (iii)  of
the issuance by the Commission of any stop order suspending the effectiveness of the Registration Statement or the initiation of any proceedings for that purpose; 


        (iv)  of
the receipt by the Company or its legal counsel of any notification with respect to the suspension of the qualification of the Securities for sale in any
jurisdiction or the initiation or threatening of any proceeding for such purpose; and 


        (v)   of
the happening of any event that requires the Company to make changes in the Registration Statement or the prospectus in order that the Registration Statement or the
prospectus do not contain an untrue statement of a material fact nor omit to state a material fact required to be stated therein or necessary to make the statements therein (in the case of the
prospectus, in light of the circumstances under which they were made) not misleading. 




        (c)   The
Company shall make every reasonable effort to obtain the withdrawal at the earliest possible time, of any order suspending the effectiveness of the Registration
Statement. 


        (d)   The
Company shall furnish to each Holder of Securities included within the coverage of the Shelf Registration, without charge, at least one copy of the Shelf
Registration Statement and any post-effective amendment thereto, including financial statements and schedules, and, if the Holder so requests in writing, all exhibits thereto (including
those, if any, incorporated by reference). 


        (e)   The
Company shall deliver to each Exchanging Dealer and each Initial Purchaser, and to any other Holder who so requests, without charge, at least one copy of the
Exchange Offer Registration Statement and any post-effective amendment thereto, including financial statements and schedules, and, if any Initial Purchaser or any such Holder requests, all
exhibits thereto (including those incorporated by reference). 



        (f)    The
Company shall, during the Shelf Registration Period, deliver to each Holder of Securities included within the coverage of the Shelf Registration, without charge, as
many copies of the prospectus (including each preliminary prospectus) included in the Shelf Registration Statement and any amendment or supplement thereto as such person may reasonably request. The
Company consents, subject to the provisions of this Agreement, to the use of the prospectus or any amendment or supplement thereto by each of the selling Holders of the Securities in connection with
the offering and sale of the Securities covered by the prospectus, or any amendment or supplement thereto, included in the Shelf Registration Statement. 



        (g)   The
Company shall deliver to each Initial Purchaser, any Exchanging Dealer, any Participating Broker-Dealer and such other persons required to deliver a prospectus
following the Registered Exchange Offer, without charge, as many copies of the final prospectus included in the Exchange Offer Registration Statement and any amendment or supplement thereto as such
persons may reasonably request. The Company consents, subject to the provisions of this Agreement, to the use of the prospectus or any amendment or supplement thereto by any Initial Purchaser, if
necessary, any Participating Broker-Dealer and such other persons required to deliver a prospectus following the Registered Exchange Offer in connection with the offering and sale of the Exchange
Securities covered by the prospectus, or any amendment or supplement thereto, included in such Exchange Offer Registration Statement. 



        (h)   Prior
to any public offering of the Securities, pursuant to any Registration Statement, the Company shall register or qualify or cooperate with the Holders of the
Securities included therein and their respective counsel in connection with the registration or qualification of the Securities for offer and sale under the securities or "blue sky" laws of such
states of the United States as any 



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Holder
of the Securities reasonably requests in writing and do any and all other acts or things necessary or advisable to enable the offer and sale in such jurisdictions of the Securities covered by
such Registration Statement; provided, however, that the Company shall not be required to (i) qualify generally to do business in any jurisdiction where it is not then so qualified or
(ii) take any action which would subject it to general service of process or to taxation in any jurisdiction where it is not then so subject. 


        (i)    The
Company shall cooperate with the Holders of the Securities to facilitate the timely preparation and delivery of certificates representing the Securities to be sold
pursuant to any Registration Statement free of any restrictive legends and in such denominations and registered in such names as the Holders may request a reasonable period of time prior to sales of
the Securities pursuant to such Registration Statement. 


        (j)    Upon
the occurrence of any event contemplated by paragraphs (ii) through (v) of Section 3(b) above during the period for which the Company is
required to maintain an effective Registration Statement, the Company shall promptly prepare and file a post-effective amendment to the Registration Statement or a supplement to the
related prospectus and any other required document so that, as thereafter delivered to Holders of the Securities or purchasers of Securities, the prospectus will not contain an untrue statement of a
material fact or omit to state any material fact required to be stated therein or necessary to make the statements therein, in light of the circumstances under which they were made, not misleading. If
the Company notifies the Initial Purchasers, the Holders of the Securities and any known Participating Broker-Dealer in accordance with paragraphs (ii) through (v) of Section 3(b)
above to suspend the use of the prospectus until the requisite changes to the prospectus have been made, then the Initial Purchasers, the Holders of the Securities and any such Participating
Broker-Dealers shall suspend use of such prospectus, and the period of effectiveness of the Shelf Registration Statement provided for in Section 2(b) above and the Exchange Offer Registration
Statement provided for in Section 1 above shall each be extended by the number of days from and including the date of the giving of such notice to and including the date when the Initial
Purchasers, the Holders of the Securities and any known Participating Broker-Dealer shall have received such amended or supplemented prospectus pursuant to this Section 3(j) or the Company
shall have notified such Holders that disposition of such Transfer Restricted Securities may resume under the existing prospectus. 


        (k)   Not
later than the effective date of the applicable Registration Statement, the Company will provide a CUSIP number for the Initial Securities, the Exchange Securities
or the Private Exchange Securities, as the case may be, and provide the applicable trustee with certificates for the Initial Securities, the Exchange Securities or the Private Exchange Securities, as
the case may be, in a form eligible for deposit with The Depository Trust Company. 



        (l)    The
Company will comply with all rules and regulations of the Commission to the extent and so long as they are applicable to the Registered Exchange Offer or the Shelf
Registration and will make generally available to its security holders (or otherwise provide in accordance with Section 11(a) of the Securities Act) an earnings statement satisfying the
provisions of Section 11(a) of the Securities Act, no later than 45 days after the end of a 12-month period (or 90 days, if such period is a fiscal year) beginning
with the first month of the Company's first fiscal quarter commencing after the effective date of the Registration Statement, which statement shall cover such 12-month period. 



        (m)  The
Company shall cause the Indenture to be qualified under the Trust Indenture Act of 1939, as amended, in a timely manner and containing such changes, if any, as shall
be necessary for such qualification. In the event that such qualification would require the appointment of a new trustee under the Indenture, the Company shall appoint a new trustee thereunder
pursuant to the applicable provisions of the Indenture. 



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        (n)   The
Company may require each Holder of Securities to be sold pursuant to the Shelf Registration Statement to furnish to the Company such information regarding the Holder
and the distribution of the Securities as the Company may from time to time reasonably require for inclusion in the Shelf Registration Statement, and the Company may exclude from such registration the
Securities of any Holder that unreasonably fails to furnish such information within a reasonable time after receiving such request. 


        (o)   The
Company shall enter into such customary agreements (including, if requested, an underwriting agreement in customary form) and take all such other action, if any, as
Holders of not less than a majority of the aggregate principal amount of the Securities to be included in the Registration Statement shall reasonably request in order to facilitate the disposition of
the Securities pursuant to any Shelf Registration Statement. 


        (p)   In
the case of any Shelf Registration, the Company shall (i) make reasonably available for inspection by the Holders of the Securities, any underwriter
participating in any disposition pursuant to the Shelf Registration Statement and any attorney, accountant or other agent retained by the Holders of the Securities or any such underwriter all relevant
financial and other records, pertinent corporate documents and properties of the Company and (ii) cause the Company's officers, directors, employees, accountants and auditors to supply all
relevant information reasonably requested by the Holders of the Securities or any such underwriter, attorney, accountant or agent in connection with the Shelf Registration Statement, in each case, as
shall be reasonably necessary to enable such persons, to conduct a reasonable investigation within the meaning of Section 11 of the Securities Act; provided, however, that the foregoing
inspection and information gathering shall be coordinated on behalf of the Initial Purchasers by you and on behalf of the other parties, by one counsel designated by and on
behalf of such other parties as described in Section 4 hereof and shall be subject to any confidentiality procedures reasonably instituted by the Company and reasonably approved by you. 



        (q)   In
the case of any Shelf Registration, the Company, if requested by the Holders of at least a majority of the aggregate principal amount of the Securities covered
thereby, shall cause (i) its counsel to deliver an opinion and updates thereof relating to the Securities in customary form addressed to such Holders and the managing underwriters, if any,
thereof and dated, in the case of the initial opinion, the effective date of such Shelf Registration Statement (it being agreed that the matters to be covered by such opinion shall include, without
limitation but subject to customary and reasonable qualifications and exceptions, the due incorporation and good standing of the Company and its subsidiaries; the qualification of the Company and its
subsidiaries to transact business as foreign corporations; the due authorization, execution and delivery of the relevant agreement of the type referred to in Section 3(o) hereof; the due
authorization, execution, authentication and issuance, and the validity and enforceability, of the applicable Securities; the absence of material legal or governmental proceedings involving the
Company and its subsidiaries; the absence of governmental approvals required to be obtained in connection with the Shelf Registration Statement, the offering and sale of the applicable Securities, or
any agreement of the type referred to in Section 3(o) hereof; the compliance as to form of such Shelf Registration Statement and any documents incorporated by reference therein and of the
Indenture with the requirements of the Securities Act and the Trust Indenture Act, respectively; and, as of the date of the opinion and as of the effective date of the Shelf Registration Statement or
most recent post-effective amendment thereto, as the case may be, the absence from such Shelf Registration Statement and the prospectus included therein, as then amended or supplemented,
and from any documents incorporated by reference therein of an untrue statement of a material fact or the omission to state therein a material fact required to be stated therein or necessary to make
the statements therein not misleading (in the case of any such documents, in the light of the circumstances existing at the time that such documents were filed with the Commission under the 



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Exchange
Act); (ii) its officers to execute and deliver all customary documents and certificates and updates thereof requested by any underwriters of the applicable Securities and
(iii) its independent public accountants to provide to the selling Holders of the applicable Securities and any underwriter therefor a comfort letter in customary form and covering matters of
the type customarily covered in comfort letters in connection with primary underwritten offerings, subject to receipt of appropriate documentation as contemplated, and only if permitted, by Statement
of Auditing Standards No. 72. 


        (r)   In
the case of the Registered Exchange Offer, if requested by any Initial Purchaser or any known Participating Broker-Dealer, the Company shall cause (i) its
counsel to deliver to such Initial Purchaser or such Participating Broker-Dealer a signed opinion in the form set forth in Section 6(c) and (d) of the Purchase Agreement with such
changes as are customary in connection with the preparation of a Registration Statement and (ii) its independent public accountants to deliver to such Initial Purchaser or such Participating
Broker-Dealer a comfort letter, in customary form, meeting the requirements as to the substance thereof as set forth in Section 6(a) of the Purchase Agreement, with appropriate date changes. 


        (s)   If
a Registered Exchange Offer or a Private Exchange is to be consummated, upon delivery of the Initial Securities by Holders to the Company (or to such other Person as
directed by the Company) in exchange for the Exchange Securities or the Private Exchange Securities, as the case may be, the Company shall mark, or cause to be marked, on the Initial Securities so
exchanged that such Initial Securities are being canceled in exchange for the Exchange Securities or the Private Exchange Securities, as the case may be; in no event shall the Initial Securities be
marked as paid or otherwise satisfied. 


        (t)    The
Company will use its reasonable best efforts to (a) if the Initial Securities have been rated prior to the initial sale of such Initial Securities, confirm
such ratings will apply to the Securities covered by a Registration Statement, or (b) if the Initial Securities were not previously rated, cause the Securities covered by a Registration
Statement to be rated with the appropriate rating agencies, if so requested by Holders of a majority in aggregate principal amount of Securities covered by such Registration Statement, or by the
managing underwriters, if any. 


        (u)   In
the event that any broker-dealer registered under the Exchange Act shall underwrite any Securities or participate as a member of an underwriting syndicate or selling
group or "assist in the distribution" (within the meaning of the Conduct Rules (the "Rules") of the National Association of Securities Dealers, Inc. ("NASD")) thereof, whether as a Holder of
such Securities or as an underwriter, a placement or sales agent or a broker or dealer in respect thereof, or otherwise, the Company will assist such broker-dealer in complying with the requirements
of such Rules, including, without limitation, by (i) if such Rules, including Rule 2720, shall so require, engaging a "qualified independent underwriter" (as defined in Rule 2720)
to participate in the preparation of the Registration Statement relating to such Securities, to exercise usual standards of due diligence in respect thereto and, if any portion of the offering
contemplated by such Registration Statement is an underwritten offering or is made through a placement or sales agent, to recommend the yield of such Securities, (ii) indemnifying any such
qualified independent underwriter to the extent of the indemnification of underwriters provided in Section 5 hereof and (iii) providing such information to such broker-dealer as may be
required in order for such broker-dealer to comply with the requirements of the Rules. 



        (v)   The
Company shall use its reasonable best efforts to take all other steps necessary to effect the registration of the Securities covered by a Registration Statement
contemplated hereby. 




        4.     Registration Expenses. The Company shall bear all fees and expenses incurred in connection with the performance of its
obligations under Sections 1 through 3 hereof (including the reasonable fees and expenses, if any, of Cravath, Swaine & Moore LLP, counsel for the Initial Purchasers, incurred 


9







 

in
connection with the Registered Exchange Offer), whether or not the Exchange Offer Registration Statement or a Shelf Registration Statement is filed or becomes effective, and, in the event of a
Shelf Registration, shall bear or reimburse the Holders of the Securities covered thereby for the reasonable fees and disbursements of one firm of counsel designated by the Holders of a majority in
principal amount of the Initial Securities covered thereby to act as counsel for the Holders of the Initial Securities in connection therewith. 



        5.     Indemnification. (a) The Company agrees to indemnify and hold harmless each Holder of the Securities, any
Participating Broker-Dealer and each person, if any, who controls such Holder or such Participating Broker-Dealer within the meaning of the Securities Act or the Exchange Act (each Holder, any
Participating Broker-Dealer and such controlling persons are referred to collectively as the "Indemnified Parties") from and against any losses, claims, damages or liabilities, joint or several, or
any actions in respect thereof (including, but not limited to, any losses, claims, damages, liabilities or actions relating to purchases and sales of the Securities) to which each Indemnified Party
may become subject under the Securities Act, the Exchange Act or otherwise, insofar as such losses, claims, damages, liabilities or actions arise out of or are based upon any untrue statement or
alleged untrue statement of a material fact contained in a Registration Statement or prospectus or in any amendment or supplement thereto or in any preliminary prospectus relating to a Shelf
Registration, or arise out of, or are based upon, the omission or alleged omission to state therein a material fact required to be stated therein or necessary to make the statements therein not
misleading, and shall reimburse, as incurred, the Indemnified Parties for any legal or other expenses reasonably incurred by them in connection with investigating or defending any such loss, claim,
damage, liability or action in respect thereof; provided, however, that (i) the Company shall not be liable in any such case to the extent that such loss, claim, damage or liability arises out
of or is based upon any untrue statement or alleged untrue statement or omission or alleged omission made in a Registration Statement or prospectus or in any amendment or supplement thereto or in any
preliminary prospectus relating to a Shelf Registration in reliance upon and in conformity with written information pertaining to such Holder and furnished to the Company by or on behalf of such
Holder specifically for inclusion therein and (ii) with respect to any untrue statement or omission or alleged untrue statement or omission made in any preliminary prospectus relating to a
Shelf Registration Statement, the indemnity agreement contained in this subsection (a) shall not inure to the benefit of any Holder or Participating Broker-Dealer from whom the person asserting
any such losses, claims, damages or liabilities purchased the Securities concerned, to the extent that a prospectus relating to such Securities was required to be delivered by such Holder or
Participating Broker-Dealer under the Securities Act in connection with such purchase and any such loss, claim, damage or liability of such Holder or Participating Broker-Dealer results from the fact
that there was not sent or given to such person, at or prior to the written confirmation of the sale of such Securities to such person, a copy of the final prospectus if the Company had previously
furnished copies thereof to such Holder or Participating Broker-Dealer; provided further, however, that this indemnity agreement will be in addition to any liability which the Company may otherwise
have to such Indemnified Party. The Company shall also indemnify underwriters, their officers and directors and each person who controls such underwriters within the meaning of the Securities Act or
the Exchange Act to the same extent as provided above with respect to the indemnification of the Holders of the Securities if requested by such Holders. 



        (b)   Each
Holder of the Securities, severally and not jointly, will indemnify and hold harmless the Company, each of its directors and each of its officers and each person,
if any, who controls the Company within the meaning of the Securities Act or the Exchange Act from and against any losses, claims, damages or liabilities or any actions in respect thereof, to which
the Company or any such controlling person may become subject under the Securities Act, the Exchange Act or otherwise, insofar as such losses, claims, damages, liabilities or actions arise out of or
are based upon any untrue statement or alleged untrue statement of a material fact contained in a Registration Statement or prospectus or in any amendment or supplement thereto or in any 



10







 

preliminary
prospectus relating to a Shelf Registration Statement, or arise out of or are based upon the omission or alleged omission to state therein a material fact necessary to make the statements
therein not misleading, but in each case only to the extent that the untrue statement or omission or alleged untrue statement or omission was made in reliance upon and in conformity with written
information pertaining to such Holder and furnished to the Company by or on behalf of such Holder specifically for inclusion therein; and, subject to the limitation set forth immediately preceding
this clause, shall reimburse, as incurred, the Company for any legal or other expenses reasonably incurred by the Company or any such controlling person in connection with investigating or defending
any loss, claim, damage, liability or action in respect thereof. This indemnity agreement will be in addition to any liability which such Holder may otherwise have to the Company or any of its
controlling persons. 


        (c)   Promptly
after receipt by an indemnified party under this Section 5 of notice of the commencement of any action or proceeding (including a governmental
investigation), such indemnified party will, if a claim in respect thereof is to be made against the indemnifying party under this Section 5, notify the indemnifying party of the commencement
thereof; but the failure to notify the indemnifying party shall not relieve the indemnifying party from any liability that it may have under subsection (a) or (b) above except to the
extent that it has been materially prejudiced (through the forfeiture of substantive rights or defenses) by such failure; and provided further that the failure to notify the indemnifying party shall
not relieve it from any liability that it may have to an indemnified party otherwise than under subsection (a) or (b) above. In case any such action is brought against any indemnified
party, and it notifies the indemnifying party of the commencement thereof, the indemnifying party will be entitled to participate therein and, to the extent that it may wish, jointly with any other
indemnifying party similarly notified, to assume the defense thereof, with counsel reasonably satisfactory to such indemnified party (who shall not, except with the consent of the indemnified party,
be counsel to the indemnifying party), and after notice from the indemnifying party to such indemnified party of its election so to assume the defense thereof the indemnifying party will not be liable
to such indemnified party under this Section 5 for any legal or other expenses, other than reasonable costs of investigation, subsequently incurred by such indemnified party in connection with
the defense thereof. In any such proceeding, any indemnified party shall have the right to retain its own counsel, but the fees and expenses of such counsel shall be at the expense of such indemnified
party unless (i) the indemnifying party and the indemnified party shall have mutually agreed to the contrary; (ii) the indemnifying party has failed within a reasonable time to retain
counsel reasonably satisfactory to the indemnified party; (iii) the indemnified party shall have reasonably concluded, based on the advice of legal counsel, that there may be legal defenses
available to it that are different from or in addition to those available to the indemnifying party; or (iv) the named parties in any such proceeding (including any impleaded parties) include
both the indemnifying party and the indemnified party and representation of both parties by the same counsel would be inappropriate due to actual or potential differing interests between them. It is
understood and agreed that the indemnifying party shall not, in connection with any proceeding or related proceeding in the same jurisdiction, be liable for the fees and expenses of more than one
separate firm (in addition to any local counsel) for all indemnified parties, and that all such fees and expenses shall be reimbursed as they are incurred. Any such separate firm for any Purchaser,
its affiliates, directors and officers and any control persons of such Purchaser shall be designated in writing by CSFB and any such separate firm for the Company, the Guarantors, their directors and
officers and any control persons of the Company and the Guarantors shall be designated in writing by the Company. No indemnifying party shall, without the prior written consent of the indemnified
party, effect any settlement of any pending or threatened action in respect of which any indemnified party is or could have been a party and indemnity could have been sought hereunder by such
indemnified party unless such settlement (i) includes an unconditional release of such indemnified party from all liability on any 



11







 




claims
that are the subject matter of such action, and (ii) does not include a statement as to or an admission of fault, culpability or a failure to act by or on behalf of any indemnified
party. 


        (d)   If
the indemnification provided for in this Section 5 is unavailable or insufficient to hold harmless an indemnified party under subsections (a) or
(b) above, then each indemnifying party shall contribute to the amount paid or payable by such indemnified party as a result of the losses, claims, damages or liabilities (or actions in respect
thereof) referred to in subsection (a) or (b) above (i) in such proportion as is appropriate to reflect the relative benefits received by the indemnifying party or parties on the
one hand and the indemnified party on the other from the exchange of the Initial Securities, pursuant
to the Registered Exchange Offer, or (ii) if the allocation provided by the foregoing clause (i) is not permitted by applicable law, in such proportion as is appropriate to reflect not
only the relative benefits referred to in clause (i) above but also the relative fault of the indemnifying party or parties on the one hand and the indemnified party on the other in connection
with the statements or omissions that resulted in such losses, claims, damages or liabilities (or actions in respect thereof) as well as any other relevant equitable considerations. The relative fault
of the parties shall be determined by reference to, among other things, whether the untrue or alleged untrue statement of a material fact or the omission or alleged omission to state a material fact
relates to information supplied by the Company on the one hand or such Holder or such other indemnified party, as the case may be, on the other, and the parties' relative intent, knowledge, access to
information and opportunity to correct or prevent such statement or omission. The amount paid by an indemnified party as a result of the losses, claims, damages or liabilities referred to in the first
sentence of this subsection (d) shall be deemed to include any legal or other expenses reasonably incurred by such indemnified party in connection with investigating or defending any action or
claim which is the subject of this subsection (d). Notwithstanding any other provision of this Section 5(d), the Holders of the Securities shall not be required to contribute any amount in
excess of the amount by which the net proceeds received by such Holders from the sale of the Securities pursuant to a Registration Statement exceeds the amount of damages which such Holders have
otherwise been required to pay by reason of such untrue or alleged untrue statement or omission or alleged omission. No person guilty of fraudulent misrepresentation (within the meaning of
Section 11(f) of the Securities Act) shall be entitled to contribution from any person who was not guilty of such fraudulent misrepresentation. For purposes of this paragraph (d), each
person, if any, who controls such indemnified party within the meaning of the Securities Act or the Exchange Act shall have the same rights to contribution as such indemnified party and each person,
if any, who controls the Company within the meaning of the Securities Act or the Exchange Act shall have the same rights to contribution as the Company. 



        (e)   The
agreements contained in this Section 5 shall survive the sale of the Securities pursuant to a Registration Statement and shall remain in full force and
effect, regardless of any termination or cancellation of this Agreement or any investigation made by or on behalf of any indemnified party. 




        6.     Additional Interest Under Certain Circumstances. (a) Additional interest (the "Additional Interest") with respect
to the Initial Securities shall be assessed as follows if any of the following events occur (each such event in clauses (i) through (vi) below a "Registration Default": 




        (i)    If
the Company fails to file an Exchange Offer Registration Statement with the Commission on or prior to the 90th day after the Issue Date, 


        (ii)   If
the Exchange Offer Registration Statement is not declared effective by the Commission on or prior to the 180th day after the Issue Date or, if filing a Shelf
Registration Statement in the circumstances referenced in clause 2(i) above, a Shelf Registration Statement is not declared effective by the Commission on or prior to the 180th day after
the Issue Date, 




12







 





        (iii)  if
the Exchange Offer is not consummated on or before the 40th day after the Exchange Offer Registration Statement is declared effective, 


        (iv)  if
filing a Shelf Registration Statement in the circumstances referenced in clause 2(ii), (iii) or (iv) above, the Company fails to file the Shelf
Registration Statement with the Commission on or prior to the 60th day (the "Shelf Filing Date") after the date on which the obligation to file a Shelf Registration Statement arises, 



        (v)   if
filing a Shelf Registration Statement in the circumstances referenced in clause 2(ii), (iii) or (iv) above, the Shelf Registration Statement is
not declared effective on or prior to the 60th day after the Shelf Filing Date, or 


        (vi)  after
the Exchange Offer Registration Statement or the Shelf Registration Statement, as the case may be, is declared effective, (A) such Registration Statement
thereafter ceases to be effective; or (B) such Registration Statement or the related prospectus ceases to be usable (except as permitted in paragraph (b)) in connection with resales of
Transfer Restricted Securities during the periods specified herein because either (1) any event occurs as a result of which the related prospectus forming part of such Registration Statement
would include any untrue statement of a material fact or omit to state any material fact necessary to make the statements therein in the light of the circumstances under which they were made not
misleading, or (2) it shall be necessary to amend such Registration Statement or supplement the related prospectus, to comply with the Securities Act or the Exchange Act or the respective rules
thereunder. 





Additional
Interest shall accrue on the Initial Securities over and above the interest set forth in the title of the Securities from and including the date on which any such Registration Default shall
occur to but excluding the date on which all such Registration Defaults have been cured, at a rate of 0.25% per annum for the first 90-day period immediately following the occurrence of a
Registration Default, and such rate will increase by an additional 0.25% per annum with respect to each subsequent 90-day period until all Registration Defaults have been cured, up to a
maximum additional interest rate of 2.0% per annum. Such Additional Interest will be in addition to any other interest payable from time to time with respect to the Initial Securities and the Exchange
Notes. 



        (b)   A
Registration Default referred to in Section 6(a)(vi)(B) hereof shall be deemed not to have occurred and be continuing in relation to a Shelf Registration
Statement or the related prospectus if (i) such Registration Default has occurred solely as a result of (x) the filing of a post-effective amendment to such Shelf
Registration Statement to incorporate annual audited financial information with respect to the Company where such post-effective amendment is not yet effective and needs to be declared
effective to permit Holders to use the related prospectus or (y) other material events, with respect to the Company that would need to be described in such Shelf Registration Statement or the
related prospectus and (ii) in the case of clause (y), the Company is proceeding promptly and in good faith to amend or supplement such Shelf Registration Statement and related
prospectus to describe such events; provided, however, that in any case if such
Registration Default occurs for a continuous period in excess of 30 days, Additional Interest shall be payable in accordance with the above paragraph from the day such Registration Default
occurs until such Registration Default is cured. 


        (c)   Any
amounts of Additional Interest due pursuant to Section 6(a) above will be payable in cash on the regular interest payment dates with respect to the Initial
Securities. The amount of Additional Interest will be determined by multiplying the applicable Additional Interest rate by the principal amount of the Initial Securities, multiplied by a fraction, the
numerator of which is the number of days such Additional Interest rate was applicable during such period (determined on the basis of a 360-day year comprised of twelve 30-day
months), and the denominator of which is 360. 



13







 




        (d)   "Transfer
Restricted Securities" means each Security until (i) the date on which such Transfer Restricted Security has been exchanged by a person other than a
broker-dealer for a freely transferable Exchange Security in the Registered Exchange Offer, (ii) following the exchange by a broker-dealer in the Registered Exchange Offer of an Initial
Security for an Exchange Note, the date on which such Exchange Note is sold to a purchaser who receives from such broker-dealer on or prior to the date of such sale a copy of the prospectus contained
in the Exchange Offer Registration Statement, (iii) the date on which such Initial Security has been effectively registered under the Securities Act and disposed of in accordance with the Shelf
Registration Statement or (iv) the date on which such Initial Securities is distributed to the public pursuant to Rule 144 under the Securities Act or is saleable pursuant to
Rule 144(k) under the Securities Act. 




        7.     Rules 144 and 144A. The Company shall use its reasonable best efforts to file the reports required to be filed by
it under the Securities Act and the Exchange Act in a timely manner and, if at any time the Company is not required to file such reports, it will, upon the request of any Holder of Initial Securities,
make publicly available other information so long as necessary to permit sales of their securities pursuant to Rules 144 and 144A. The Company covenants that it will take such further action as
any Holder of Initial Securities may reasonably request, all to the extent required from time to time to enable such Holder to sell Initial Securities without registration under the Securities Act
within the limitation of the exemptions provided by Rules 144 and 144A (including the requirements of Rule 144A(d)(4)). The Company will provide a copy of this Agreement to prospective
purchasers of Initial Securities identified to the Company by the Initial Purchasers upon request. Upon the request of any Holder of Initial Securities, the Company shall deliver to such Holder a
written statement as to whether it has complied with such requirements. Notwithstanding the foregoing, nothing in this Section 7 shall be deemed to require the Company to register any of its
securities pursuant to the Exchange Act. 


        8.     Underwritten Registrations. If any of the Transfer Restricted Securities covered by any Shelf Registration are to be sold
in an underwritten offering, the investment banker or investment bankers and manager or managers that will administer the offering ("Managing Underwriters") will be selected by the Holders of a
majority in aggregate principal amount of such Transfer Restricted Securities to be included in such offering. 



        No
person may participate in any underwritten registration hereunder unless such person (i) agrees to sell such person's Transfer Restricted Securities on the basis reasonably
provided in any underwriting arrangements approved by the persons entitled hereunder to approve such arrangements and (ii) completes and executes all questionnaires, powers of attorney,
indemnities, underwriting agreements and other documents reasonably required under the terms of such underwriting arrangements. Except as provided in Section 4, the Holders participating in any
underwritten offering shall be responsible for any expenses customarily borne by selling securityholders, including underwriting discounts and commissions and fees and expenses of counsel to selling
securityholders. 


        9.     Miscellaneous. 



        (a)   Amendments and Waivers. The provisions of this Agreement may not be amended, modified or supplemented, and waivers or
consents to departures from the provisions hereof may not be given, except by the Company and the written consent of the Holders of a majority in principal amount of the Securities affected by such
amendment, modification, supplement, waiver or consents. 



14







 

        (b)   Notices. All notices and other communications provided for or permitted hereunder shall be made in writing by hand
delivery, first-class mail, facsimile transmission, or air courier which guarantees overnight delivery: 



        (i)    if
to a Holder of the Securities, at the most current address given by such Holder to the Company. 



        (ii)   if
to the Initial Purchasers; 




Credit
Suisse First Boston LLC

Eleven Madison Avenue

New York, NY 10010-3629

Fax No.: (212) 325-8278

Attention: Transactions Advisory Group 


Citigroup
Global Markets Inc.

338 Greenwich Street

32nd Floor

New York, NY 10013

Attention: Legal—Addison Crawford 





with
a copy to: 




Cravath,
Swaine & Moore LLP

825 Eighth Avenue

New York, NY 10019

Attention: Stephen L. Burns, Esq. 





        (iii)  if
to the Company, at its address as follows: 




Concentra
Operating Corporation

5080 Spectrum Drive

Suite 400-West Tower

Addison, TX 75001

Attention: Richard Parr, Esq. 





with
a copy to: 




Vinson &
Elkins L.L.P.

2001 Ross Avenue

3700 Transmell Crow Center

Dallas, TX 75201-2975

Attention: Jeffrey A. Chapman, Esq. 







        All
such notices and communications shall be deemed to have been duly given: at the time delivered by hand, if personally delivered; three business days after being deposited in the
mail, postage prepaid, if mailed; when receipt is acknowledged by recipient's facsimile machine operator, if sent by facsimile transmission; and on the day delivered, if sent by overnight air courier
guaranteeing next day delivery. 



        (c)   No Inconsistent Agreements. The Company has not, as of the date hereof, entered into, nor shall it, on or after the date
hereof, enter into, any agreement with respect to its securities that is inconsistent with the rights granted to the Holders herein or otherwise conflicts with the provisions hereof. 


        (d)   Successors and Assigns. This Agreement shall be binding upon the Company and its successors and assigns. 



15











        (e)   Counterparts. This Agreement may be executed in any number of counterparts and by the parties hereto in separate
counterparts, each of which when so executed shall be deemed to be an original and all of which taken together shall constitute one and the same agreement. 


        (f)    Headings. The headings in this Agreement are for convenience of reference only and shall not limit or otherwise affect
the meaning hereof. 


        (g)   Governing Law. THIS AGREEMENT SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK. 



        (h)   Severability. If any one or more of the provisions contained herein, or the application thereof in any circumstance, is
held invalid, illegal or unenforceable, the validity, legality and enforceability of any such provision in every other respect and of the remaining provisions contained herein shall not be affected or
impaired thereby. 


        (i)    Securities Held by the Company. Whenever the consent or approval of Holders of a specified percentage of principal amount
of Securities is required hereunder, Securities held by the Company or its affiliates (other than subsequent Holders of Securities if such subsequent Holders are deemed to be affiliates solely by
reason of their holdings of such Securities) shall not be counted in determining whether such consent or approval was given by the Holders of such required percentage. 









        If
the foregoing is in accordance with your understanding of our agreement, please sign and return to the Issuer a counterpart hereof, whereupon this instrument, along with all
counterparts, will become a binding agreement among the several Initial Purchasers and the Company in accordance with its terms. 



	 	 	Very truly yours,
	

 	
 	

CONCENTRA OPERATING CORPORATION
	

 	
 	

By:	
 	

/s/  RICHARD A. PARR II      
 Richard A. Parr II

Executive Vice President, General Counsel and Corporate Secretary
	

 	
 	

CONCENTRA HEALTH SERVICES, INC.

CONCENTRA PREFERRED SYSTEMS, INC.
	

 	
 	

By:	
 	

/s/  RICHARD A. PARR II      
 Richard A. Parr II

Executive Vice President, General Counsel and Corporate Secretary
	

 	
 	

CONCENTRA INTEGRATED SERVICES, INC.
	

 	
 	

By:	
 	

/s/  RICHARD A. PARR II      
 Richard A. Parr II

Executive Vice President and Clerk
	

 	
 	

CONCENTRA MANAGEMENT SERVICES, INC.

FIRST NOTICE SYSTEMS, INC.

FOCUS HEALTHCARE MANAGEMENT, INC.

METRACOMP, INC.

CONCENTRA LABORATORY, L.L.C.

CISI BUSINESS CORPORATION

CPS BUSINESS CORPORATION

FHM BUSINESS CORPORATION
	

 	
 	

By:	
 	

/s/  RICHARD A. PARR II      
 Richard A. Parr II

Vice President and Corporate Secretary











	

 	
 	

CRA MANAGED CARE OF WASHINGTON, INC.

CRA-MCO, INC.
	

 	
 	

By:	
 	

/s/  RICHARD A. PARR II      
 Richard A. Parr II

Executive Vice President and Corporate Secretary
	

 	
 	

HEALTHNETWORK SYSTEMS LLC

MEDICAL NETWORK SYSTEMS LLC
	

 	
 	

By:	
 	

/s/  RICHARD A. PARR II      
 Richard A. Parr II

Vice President, General Counsel and Corporate Secretary
	

 	
 	

NATIONAL HEALTHCARE RESOURCES, INC.
	

 	
 	

By:	
 	

/s/  RICHARD A. PARR II      
 Richard A. Parr II

Senior Vice President and Corporate Secretary
	

 	
 	

OCCUCENTERS I, L.P.
	

 	
 	

By:	
 	

Its general partner

CONCENTRA HEALTH SERVICES, INC.
	

 	
 	

 	
 	

By:	

/s/  RICHARD A. PARR II      
 Richard A. Parr II

Executive Vice President, General Counsel and Corporate Secretary
	

 	
 	

OCI HOLDINGS, INC.
	

 	
 	

By:	
 	

/s/  GARY CHEDEKEL      
 Gary Chedekel

Corporate Secretary and Treasurer











	The foregoing Registration Rights Agreement is hereby confirmed and accepted as of the date first above written.
	

CREDIT SUISSE FIRST BOSTON LLC
	

 	
 	

 	

Acting on behalf of itself and as the

Representative of the Initial Purchasers
	

CREDIT SUISSE FIRST BOSTON LLC
	

 	
 	

by	

/s/  HAROLD BOGLE      
 Name: Harold Bogle

Title: Managing Director
	

CITIGROUP GLOBAL MARKETS INC.
	

 	
 	

 	

Acting on behalf of itself and as the

Representative of the Initial Purchasers
	

CITIGROUP GLOBAL MARKETS INC.
	

 	
 	

by	

/s/  RICHARD LANDGARTEN      
 Name: Richard Landgarten

Title: Managing Director











 
 

ANNEX A    
    


        Each
broker-dealer that receives Exchange Securities for its own account pursuant to the Exchange Offer must acknowledge that it will deliver a prospectus in connection with any resale
of such Exchange Securities. The Letter of Transmittal states that by so acknowledging and by delivering a prospectus, a broker-dealer will not be deemed to admit that it is an "underwriter" within
the meaning of the Securities Act. This Prospectus, as it may be amended or supplemented from time to time, may be used by a broker-dealer in connection with resales of Exchange Securities received in
exchange for Initial Securities where such Initial Securities were acquired by such broker-dealer as a result of market-making activities or other trading activities. The Company has agreed that, for
a period of 180 days after the Expiration Date (as defined herein), it will make this Prospectus available to any broker-dealer for use in connection with any such resale. See "Plan of
Distribution." 







 
 

ANNEX B    
    


        Each
broker-dealer that receives Exchange Securities for its own account in exchange for Securities, where such Initial Securities were acquired by such broker-dealer as a result of
market-making activities or other trading activities, must acknowledge that it will deliver a prospectus in connection with any resale of such Exchange Securities. See "Plan of Distribution." 







 
 

ANNEX C    
    


        PLAN
OF DISTRIBUTION 


        Each
broker-dealer that receives Exchange Securities for its own account pursuant to the Exchange Offer must acknowledge that it will deliver a prospectus in connection with any resale
of such Exchange Securities. This Prospectus, as it may be amended or supplemented from time to time, may be used by a broker-dealer in connection with resales of Exchange Securities received in
exchange for Initial Securities where such Initial Securities were acquired as a result of market-making activities or other trading activities. The Company has agreed that, for a period of
180 days after the Expiration Date, it will make this prospectus, as amended or supplemented, available to any broker-dealer for use in connection with any such resale. In addition, until
                        , 200  , all dealers effecting transactions in the Exchange Securities may be required to
deliver a prospectus.(1) 


	(1)
	In
addition, the legend required by Item 502(e) of Regulation S-K will appear on the back cover page of the Exchange Offer prospectus. 



        The
Company will not receive any proceeds from any sale of Exchange Securities by broker-dealers. Exchange Securities received by broker-dealers for their own account pursuant to the
Exchange Offer may be sold from time to time in one or more transactions in the over-the-counter market, in negotiated transactions, through the writing of options on the
Exchange Securities or a combination of such methods of resale, at market prices prevailing at the time of resale, at prices related to such prevailing market prices or negotiated prices. Any such
resale may be made directly to purchasers or to or through brokers or dealers who may receive compensation in the form of commissions or concessions from any such broker-dealer or the purchasers of
any such Exchange Securities. Any broker-dealer that resells Exchange Securities that were received by it for its own account pursuant to the Exchange Offer and any broker or dealer that participates
in a distribution of such Exchange Securities may be deemed to be an "underwriter" within the meaning of the Securities Act and any profit on any such resale of Exchange Securities and any commission
or concessions received by any such persons may be deemed to be underwriting compensation under the Securities Act. The Letter of Transmittal states that, by acknowledging that it will deliver and by
delivering a prospectus, a broker-dealer will not be deemed to admit that it is an "underwriter" within the meaning of the Securities Act. 


        For
a period of 180 days after the Expiration Date the Company will promptly send additional copies of this Prospectus and any amendment or supplement to this Prospectus to any
broker-dealer that requests such documents in the Letter of Transmittal. The Company has agreed to pay all expenses incident to the Exchange Offer (including the expenses of one counsel for the
Holders of the Securities) other than commissions or concessions of any brokers or dealers and will indemnify the Holders of the Securities (including any broker-dealers) against certain liabilities,
including liabilities under the Securities Act. 







 
 

ANNEX D    
    


        CHECK
HERE IF YOU ARE A BROKER-DEALER AND WISH TO RECEIVE 10 ADDITIONAL COPIES OF THE PROSPECTUS AND 10 COPIES OF ANY AMENDMENTS OR SUPPLEMENTS THERETO. 



	 	 	Name:	 
	 	 	 	

	 	 	Address:	 
	 	 	 	

	 	 	 	






If
the undersigned is not a broker-dealer, the undersigned represents that it is not engaged in, and does not intend to engage in, a distribution of Exchange Securities. If the undersigned is a
broker-dealer that will receive Exchange Securities for its own account in exchange for Initial Securities that were acquired as a result of market-making activities or other trading activities, it
acknowledges that it will deliver a prospectus in connection with any resale of such Exchange Securities; however, by so acknowledging and by delivering a prospectus, the undersigned will not be
deemed to admit that it is an "underwriter" within the meaning of the Securities Act. 











QuickLinks



Exhibit 4.12




ANNEX A

ANNEX B

ANNEX C

ANNEX D