EXHIBIT 10.6

EXHIBIT F

SUBSIDIARY GUARANTEE

SUBSIDIARY GUARANTEE, dated as of August         , 2007 (this “Guarantee”), made
by each of the signatories hereto (together with any other entity that may
become a party hereto as provided herein, the “Guarantors”), in favor of the
purchasers signatory (the “Purchasers”) the Purchase Agreements (as defined
below).

WITNESSETH:

WHEREAS, pursuant to that certain Securities Purchase Agreement, dated September
15, 2005, that certain Securities Purchase Agreement, dated August 30, 2006 and
that certain Securities Purchase Agreement dated as of the date hereof, by and
between the Company and the Purchasers (collectively, the “Purchase
Agreements”), the Company has agreed to sell and issue to the Purchasers, and
the Purchasers have agreed to purchase from the Company the Company’s Amortizing
Convertible Debentures issued on September 15, 2005, Amortizing Convertible
Debentures issued on August 30, 2006 and Amortizing Senior Secured Convertible
Debentures issued on August    , 2007 (collectively, the “Debentures”), subject
to the terms and conditions set forth therein; and

WHEREAS, each Guarantor will directly benefit from the extension of credit to
the Company represented by the issuance of the Debentures; and

NOW, THEREFORE, in consideration of the premises and to induce the Purchasers to
enter into the applicable Purchase Agreement and to carry out the transactions
contemplated thereby, each Guarantor hereby agrees with the Purchasers as
follows:

1.                                        Definitions. Unless otherwise defined
herein, terms defined in the Purchase Agreement most recently entered into with
the applicable Purchaser and used herein shall have the meanings given to them
in such Purchase Agreement. The words “hereof,” “herein,” “hereto” and
“hereunder” and words of similar import when used in this Guarantee shall refer
to this Guarantee as a whole and not to any particular provision of this
Guarantee, and Section and Schedule references are to this Guarantee unless
otherwise specified. The meanings given to terms defined herein shall be equally
applicable to both the singular and plural forms of such terms.  The following
terms shall have the following meanings:

“Guarantee” means this Subsidiary Guarantee, as the same may be amended,
supplemented or otherwise modified from time to time.

“Obligations” means, in addition to all other costs and expenses of collection
incurred by Purchasers in enforcing any of such Obligations and/or this
Guarantee, all of the liabilities and obligations (primary, secondary, direct,
contingent, sole, joint or several) due or to become due, or that are now or may
be

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hereafter contracted or acquired, or owing to, of any Debtor to the Secured
Parties, including, without limitation, all obligations under this Agreement,
the Debentures, this Guarantee and any other instruments, agreements or other
documents executed and/or delivered in connection herewith or therewith, in each
case, whether now or hereafter existing, voluntary or involuntary, direct or
indirect, absolute or contingent, liquidated or unliquidated, whether or not
jointly owed with others, and whether or not from time to time decreased or
extinguished and later increased, created or incurred, and all or any portion of
such obligations or liabilities that are paid, to the extent all or any part of
such payment is avoided or recovered directly or indirectly from any of the
Secured Parties as a preference, fraudulent transfer or otherwise as such
obligations may be amended, supplemented, converted, extended or modified from
time to time.  Without limiting the generality of the foregoing, the term
“Obligations” shall include, without limitation: (i) principal of, and interest
on the Debentures and the loans extended pursuant thereto; (ii) any and all
other fees, indemnities, costs, obligations and liabilities of the Debtors from
time to time under or in connection with this Agreement, the Debentures, the
Guarantee and any other instruments, agreements or other documents executed
and/or delivered in connection herewith or therewith; and (iii) all amounts
(including but not limited to post-petition interest) in respect of the
foregoing that would be payable but for the fact that the obligations to pay
such amounts are unenforceable or not allowable due to the existence of a
bankruptcy, reorganization or similar proceeding involving any Debtor.

2.                                        Guarantee.

(a)                                   Guarantee.

(i)                                      The Guarantors hereby, jointly and
severally, unconditionally and irrevocably, guarantee to the Purchasers and
their respective successors, indorsees, transferees and assigns, the prompt and
complete payment and performance by the Company when due (whether at the stated
maturity, by acceleration or otherwise) of the Obligations.

(ii)                                   Anything herein or in any other
Transaction Document to the contrary notwithstanding, the maximum liability of
each Guarantor hereunder and under the other Transaction Documents shall in no
event exceed the amount which can be guaranteed by such Guarantor under
applicable federal and state laws, including laws relating to the insolvency of
debtors, fraudulent conveyance or transfer or laws affecting the rights of
creditors generally (after giving effect to the right of contribution
established in Section 2(b)).

(iii)                                Each Guarantor agrees that the Obligations
may at any time and from time to time exceed the amount of the liability of such
Guarantor

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hereunder without impairing the guarantee contained in this Section 2 or
affecting the rights and remedies of the Purchasers hereunder.

(iv)                               The guarantee contained in this Section 2
shall remain in full force and effect until all the Obligations and the
obligations of each Guarantor under the guarantee contained in this Section 2
shall have been satisfied by payment in full.

(v)                                  No payment made by the Company, any of the
Guarantors, any other guarantor or any other Person or received or collected by
the Purchasers from the Company, any of the Guarantors, any other guarantor or
any other Person by virtue of any action or proceeding or any set-off or
appropriation or application at any time or from time to time in reduction of or
in payment of the Obligations shall be deemed to modify, reduce, release or
otherwise affect the liability of any Guarantor hereunder which shall,
notwithstanding any such payment (other than any payment made by such Guarantor
in respect of the Obligations or any payment received or collected from such
Guarantor in respect of the Obligations), remain liable for the Obligations up
to the maximum liability of such Guarantor hereunder until the Obligations are
paid in full.

(vi)                               Notwithstanding anything to the contrary in
this Agreement, with respect to any defaulted non-monetary Obligations the
specific performance of which by the Guarantors is not reasonably possible (e.g.
the issuance of the Company’s Common Stock), the Guarantors shall only be liable
for making the Purchasers whole on a monetary basis for the Company’s failure to
perform such Obligations in accordance with the Transaction Documents.

(b)                                  Right of Contribution. Each Guarantor
hereby agrees that to the extent that a Guarantor shall have paid more than its
proportionate share of any payment made hereunder, such Guarantor shall be
entitled to seek and receive contribution from and against any other Guarantor
hereunder which has not paid its proportionate share of such payment. Each
Guarantor’s right of contribution shall be subject to the terms and conditions
of Section 2(c). The provisions of this Section 2(b) shall in no respect limit
the obligations and liabilities of any Guarantor to the Purchasers, and each
Guarantor shall remain liable to the Purchasers for the full amount guaranteed
by such Guarantor hereunder.

(c)                                   No Subrogation.  Notwithstanding any
payment made by any Guarantor hereunder or any set-off or application of funds
of any Guarantor by the Purchasers, no Guarantor shall be entitled to be
subrogated to any of the rights of the Purchasers against the Company or any
other Guarantor or any collateral security or guarantee or right of offset held
by the Purchasers for the payment of the Obligations, nor shall any Guarantor
seek or be entitled to seek any contribution or reimbursement from the Company
or any other Guarantor in

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respect of payments made by such Guarantor hereunder, until all amounts owing to
the Purchasers by the Company on account of the Obligations are paid in full. If
any amount shall be paid to any Guarantor on account of such subrogation rights
at any time when all of the Obligations shall not have been paid in full, such
amount shall be held by such Guarantor in trust for the Purchasers, segregated
from other funds of such Guarantor, and shall, forthwith upon receipt by such
Guarantor, be turned over to the Purchasers in the exact form received by such
Guarantor (duly indorsed by such Guarantor to the Purchasers, if required), to
be applied against the Obligations, whether matured or unmatured, in such order
as the Purchasers may determine.

(d)                                  Amendments, Etc. With Respect to the
Obligations. Each Guarantor shall remain obligated hereunder notwithstanding
that, without any reservation of rights against any Guarantor and without notice
to or further assent by any Guarantor, any demand for payment of any of the
Obligations made by the Purchasers may be rescinded by the Purchasers and any of
the Obligations continued, and the Obligations, or the liability of any other
Person upon or for any part thereof, or any collateral security or guarantee
therefor or right of offset with respect thereto, may, from time to time, in
whole or in part, be renewed, extended, amended, modified, accelerated,
compromised, waived, surrendered or released by the Purchasers, and the Purchase
Agreements and the other Transaction Documents and any other documents executed
and delivered in connection therewith may be amended, modified, supplemented or
terminated, in whole or in part, as the Purchasers may deem advisable from time
to time, and any collateral security, guarantee or right of offset at any time
held by the Purchasers for the payment of the Obligations may be sold,
exchanged, waived, surrendered or released. The Purchasers shall have no
obligation to protect, secure, perfect or insure any Lien at any time held by
them as security for the Obligations or for the guarantee contained in this
Section 2 or any property subject thereto.

(e)                                   Guarantee Absolute and Unconditional. Each
Guarantor waives any and all notice of the creation, renewal, extension or
accrual of any of the Obligations and notice of or proof of reliance by the
Purchasers upon the guarantee contained in this Section 2 or acceptance of the
guarantee contained in this Section 2; the Obligations, and any of them, shall
conclusively be deemed to have been created, contracted or incurred, or renewed,
extended, amended or waived, in reliance upon the guarantee contained in this
Section 2; and all dealings between the Company and any of the Guarantors, on
the one hand, and the Purchasers, on the other hand, likewise shall be
conclusively presumed to have been had or consummated in reliance upon the
guarantee contained in this Section 2. Each Guarantor waives to the extent
permitted by law diligence, presentment, protest, demand for payment and notice
of default or nonpayment to or upon the Company or any of the Guarantors with
respect to the Obligations. Each Guarantor understands and agrees that the
guarantee contained in this Section 2 shall be construed as a continuing,
absolute and unconditional guarantee of payment without regard to (a) the
validity or enforceability of the Purchase

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Agreements or any other Transaction Document, any of the Obligations or any
other collateral security therefor or guarantee or right of offset with respect
thereto at any time or from time to time held by the Purchasers, (b) any
defense, set-off or counterclaim (other than a defense of payment or performance
or fraud or misconduct by Purchasers) which may at any time be available to or
be asserted by the Company or any other Person against the Purchasers, or (c)
any other circumstance whatsoever (with or without notice to or knowledge of the
Company or such Guarantor) which constitutes, or might be construed to
constitute, an equitable or legal discharge of the Company for the Obligations,
or of such Guarantor under the guarantee contained in this Section 2, in
bankruptcy or in any other instance. When making any demand hereunder or
otherwise pursuing its rights and remedies hereunder against any Guarantor, the
Purchasers may, but shall be under no obligation to, make a similar demand on or
otherwise pursue such rights and remedies as they may have against the Company,
any other Guarantor or any other Person or against any collateral security or
guarantee for the Obligations or any right of offset with respect thereto, and
any failure by the Purchasers to make any such demand, to pursue such other
rights or remedies or to collect any payments from the Company, any other
Guarantor or any other Person or to realize upon any such collateral security or
guarantee or to exercise any such right of offset, or any release of the
Company, any other Guarantor or any other Person or any such collateral
security, guarantee or right of offset, shall not relieve any Guarantor of any
obligation or liability hereunder, and shall not impair or affect the rights and
remedies, whether express, implied or available as a matter of law, of the
Purchasers against any Guarantor. For the purposes hereof, “demand” shall
include the commencement and continuance of any legal proceedings.

(f)                                     Reinstatement. The guarantee contained
in this Section 2 shall continue to be effective, or be reinstated, as the case
may be, if at any time payment, or any part thereof, of any of the Obligations
is rescinded or must otherwise be restored or returned by the Purchasers upon
the insolvency, bankruptcy, dissolution, liquidation or reorganization of the
Company or any Guarantor, or upon or as a result of the appointment of a
receiver, intervenor or conservator of, or trustee or similar officer for, the
Company or any Guarantor or any substantial part of its property, or otherwise,
all as though such payments had not been made.

(g)                                  Payments. Each Guarantor hereby guarantees
that payments hereunder will be paid to the Purchasers without set-off or
counterclaim in U.S. dollars at the address set forth or referred to in the
Purchase Agreement most recently entered into by the applicable Purchaser.

3.                                        Representations and Warranties. Each
Guarantor hereby makes the following representations and warranties to
Purchasers as of the date hereof:

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(a)                                   Organization and Qualification. The
Guarantor is a corporation, duly incorporated, validly existing and in good
standing under the laws of the applicable jurisdiction set forth on Schedule 1,
with the requisite corporate power and authority to own and use its properties
and assets and to carry on its business as currently conducted. The Guarantor
has no subsidiaries other than those identified as such on the Disclosure
Schedules to the Purchase Agreements. The Guarantor is duly qualified to do
business and is in good standing as a foreign corporation in each jurisdiction
in which the nature of the business conducted or property owned by it makes such
qualification necessary, except where the failure to be so qualified or in good
standing, as the case may be, could not, individually or in the aggregate, (x)
adversely affect the legality, validity or enforceability of any of this
Guaranty in any material respect, (y) have a material adverse effect on the
results of operations, assets, prospects, or financial condition of the
Guarantor or (z) adversely impair in any material respect the Guarantor’s
ability to perform fully on a timely basis its obligations under this Guaranty
(a “Material Adverse Effect”).

(b)                                  Authorization; Enforcement.  The Guarantor
has the requisite corporate power and authority to enter into and to consummate
the transactions contemplated by this Guaranty, and otherwise to carry out its
obligations hereunder. The execution and delivery of this Guaranty by the
Guarantor and the consummation by it of the transactions contemplated hereby
have been duly authorized by all requisite corporate action on the part of the
Guarantor. This Guaranty has been duly executed and delivered by the Guarantor
and constitutes the valid and binding obligation of the Guarantor enforceable
against the Guarantor in accordance with its terms, except as such
enforceability may be limited by applicable bankruptcy, insolvency,
reorganization, moratorium, liquidation or similar laws relating to, or
affecting generally the enforcement of, creditors’ rights and remedies or by
other equitable principles of general application.

(c)                                   No Conflicts. The execution, delivery and
performance of this Guaranty by the Guarantor and the consummation by the
Guarantor of the transactions contemplated thereby do not and will not (i)
conflict with or violate any provision of its Certificate of Incorporation or
By-laws or (ii) conflict with, constitute a default (or an event which with
notice or lapse of time or both would become a default) under, or give to others
any rights of termination, amendment, acceleration or cancellation of, any
agreement, indenture or instrument to which the Guarantor is a party, or (iii)
result in a violation of any law, rule, regulation, order, judgment, injunction,
decree or other restriction of any court or governmental authority to which the
Guarantor is subject (including Federal and state securities laws and
regulations), or by which any material property or asset of the Guarantor is
bound or affected, except in the case of each of clauses (ii) and (iii), such
conflicts, defaults, terminations, amendments, accelerations, cancellations and
violations as could not, individually or in the aggregate, have or result in a
Material Adverse Effect. The business of the Guarantor is not being

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conducted in violation of any law, ordinance or regulation of any governmental
authority, except for violations which, individually or in the aggregate, do not
have a Material Adverse Effect.

(d)                                  Consents and Approvals. The Guarantor is
not required to obtain any consent, waiver, authorization or order of, or make
any filing or registration with, any court or other federal, state, local,
foreign or other governmental authority or other person in connection with the
execution, delivery and performance by the Guarantor of this Guaranty.

(e)                                   Purchase Agreement. The representations
and warranties of the Company set forth in the Purchase Agreements as they
relate to such Guarantor, each of which is hereby incorporated herein by
reference, are true and correct as of each time such representations are deemed
to be made pursuant to such Purchase Agreements, and the Purchasers shall be
entitled to rely on each of them as if they were fully set forth herein,
provided that each reference in each such representation and warranty to the
Company’s knowledge shall, for the purposes of this Section 3, be deemed to be a
reference to such Guarantor’s knowledge.

(f)                                     Foreign Law.  Each Guarantor has
consulted with appropriate foreign legal counsel with respect to any of the
above representations for which non-U.S. law is applicable. Such foreign counsel
have advised each applicable Guarantor that such counsel knows of no reason why
any of the above representations would not be true and accurate. Such foreign
counsel were provided with copies of this Subsidiary Guarantee and the
Transaction Documents prior to rendering their advice.

4.                                        Covenants.

(a)                       Each Guarantor covenants and agrees with the
Purchasers that, from and after the date of this Guarantee until the Obligations
shall have been paid in full, such Guarantor shall take, and/or shall refrain
from taking, as the case may be, each commercially reasonable action that is
necessary to be taken or not taken, as the case may be, so that no Event of
Default is caused by the failure to take such action or to refrain from taking
such action by such Guarantor.

(b)                      So long as any of the Obligations are outstanding,
unless Purchasers holding at least 67% of the aggregate principal amount of the
then outstanding Debentures shall otherwise consent in writing, each Guarantor
will not directly or indirectly on or after the date of this Guarantee:

i.                                           enter into, create, incur, assume
or suffer to exist any indebtedness for borrowed money of any kind, including
but not limited to, a guarantee, on or with respect to any of its property or
assets now owned or hereafter acquired or any interest therein or any income or
profits therefrom;

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ii.                                        enter into, create, incur, assume or
suffer to exist any liens of any kind, on or with respect to any of its property
or assets now owned or hereafter acquired or any interest therein or any income
or profits therefrom;

iii.                                     amend its certificate of incorporation,
bylaws or other charter documents so as to adversely affect any rights of the
Holder hereunder;

iv.                                    repay, repurchase or offer to repay,
repurchase or otherwise acquire more than a de minimis number of shares of its
securities or debt obligations;

v.                                       pay cash dividends on any equity
securities of the Company;

vi.                                    enter into any transaction with any
Affiliate of the Guarantor which would be required to be disclosed in any public
filing of the Company with the Commission, unless such transaction is made on an
arm’s-length basis and expressly approved by a majority of the disinterested
directors of the Company (even if less than a quorum otherwise required for
board approval); or

vii.                                 enter into any agreement with respect to
any of the foregoing.

Provided, however, that the Guarantor shall not be prohibited from undertaking
any of the actions described above that the Company is permitted to undertake
pursuant to the terms of the Purchase Agreements, Debentures and any and all
other agreements or other documents entered into in connection with the
financings contemplated by the Purchase Agreements.

5.                                        Miscellaneous.

(a)                                   Amendments in Writing. None of the terms
or provisions of this Guarantee may be waived, amended, supplemented or
otherwise modified except in writing by Purchasers holding 67% of the principal
amount of Debentures then outstanding.

(b)                                  Notices. All notices, requests and demands
to or upon the Purchasers or any Guarantor hereunder shall be effected in the
manner provided for in the Purchase Agreement most recently entered into by the
applicable Purchaser, provided that any such notice, request or demand to or
upon any

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Guarantor shall be addressed to such Guarantor at its notice address set forth
on Schedule 5(b).

(c)                                   No Waiver By Course Of Conduct; Cumulative
Remedies. The Purchasers shall not by any act (except by a written instrument
pursuant to Section 5(a)), delay, indulgence, omission or otherwise be deemed to
have waived any right or remedy hereunder or to have acquiesced in any default
under the Transaction Documents or Event of Default. No failure to exercise, nor
any delay in exercising, on the part of the Purchasers, any right, power or
privilege hereunder shall operate as a waiver thereof. No single or partial
exercise of any right, power or privilege hereunder shall preclude any other or
further exercise thereof or the exercise of any other right, power or privilege.
A waiver by the Purchasers of any right or remedy hereunder on any one occasion
shall not be construed as a bar to any right or remedy which the Purchasers
would otherwise have on any future occasion. The rights and remedies herein
provided are cumulative, may be exercised singly or concurrently and are not
exclusive of any other rights or remedies provided by law.

(d)                                  Enforcement Expenses; Indemnification.

(i)                                      Each Guarantor agrees to pay, or
reimburse the Purchasers for, all its costs and expenses incurred in collecting
against such Guarantor under the guarantee contained in Section 2 or otherwise
enforcing or preserving any rights under this Guarantee and the other
Transaction Documents to which such Guarantor is a party, including, without
limitation, the reasonable fees and disbursements of counsel to the Purchasers.

(ii)                                   Each Guarantor agrees to pay, and to save
the Purchasers harmless from, any and all liabilities with respect to, or
resulting from any delay in paying, any and all stamp, excise, sales or other
taxes which may be payable or determined to be payable in connection with any of
the transactions contemplated by this Guarantee.

(iii)                                Each Guarantor agrees to pay, and to save
the Purchasers harmless from, any and all liabilities, obligations, losses,
damages, penalties, actions, judgments, suits, costs, expenses or disbursements
of any kind or nature whatsoever with respect to the execution, delivery,
enforcement, performance and administration of this Guarantee to the extent the
Company would be required to do so pursuant to the Purchase Agreements.

(iv)                               The agreements in this Section shall survive
repayment of the Obligations and all other amounts payable under the Purchase
Agreements and the other Transaction Documents.

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(e)                                   Successor and Assigns. This Guarantee
shall be binding upon the successors and assigns of each Guarantor and shall
inure to the benefit of the Purchasers and their respective successors and
assigns; provided that no Guarantor may assign, transfer or delegate any of its
rights or obligations under this Guarantee without the prior written consent of
the Purchasers.

(f)                                     Set-Off. Each Guarantor hereby
irrevocably authorizes the Purchasers at any time and from time to time while an
Event of Default under any of the Transaction Documents shall have occurred and
be continuing, without notice to such Guarantor or any other Guarantor, any such
notice being expressly waived by each Guarantor, to set-off and appropriate and
apply any and all deposits, credits, indebtedness or claims, in any currency, in
each case whether direct or indirect, absolute or contingent, matured or
unmatured, at any time held or owing by the Purchasers to or for the credit or
the account of such Guarantor, or any part thereof in such amounts as the
Purchasers may elect, against and on account of the obligations and liabilities
of such Guarantor to the Purchasers hereunder and claims of every nature and
description of the Purchasers against such Guarantor, in any currency, whether
arising hereunder, under the Purchase Agreements, any other Transaction Document
or otherwise, as the Purchasers may elect, whether or not the Purchasers have
made any demand for payment and although such obligations, liabilities and
claims may be contingent or unmatured. The Purchasers shall notify such
Guarantor promptly of any such set-off and the application made by the
Purchasers of the proceeds thereof, provided that the failure to give such
notice shall not affect the validity of such set-off and application. The rights
of the Purchasers under this Section are in addition to other rights and
remedies(including, without limitation, other rights of set-off) which the
Purchasers may have.

(g)                                  Counterparts. This Guarantee may be
executed by one or more of the parties to this Guarantee on any number of
separate counterparts (including by telecopy), and all of said counterparts
taken together shall be deemed to constitute one and the same instrument.

(h)                                  Severability. Any provision of this
Guarantee which is prohibited or unenforceable in any jurisdiction shall, as to
such jurisdiction, be ineffective to the extent of such prohibition or
unenforceability without invalidating the remaining provisions hereof, and any
such prohibition or unenforceability in any jurisdiction shall not invalidate or
render unenforceable such provision in any other jurisdiction.

(i)                                      Section Headings. The Section headings
used in this Guarantee are for convenience of reference only and are not to
affect the construction hereof or be taken into consideration in the
interpretation hereof.

(j)                                      Integration. This Guarantee and the
other Transaction Documents represent the agreement of the Guarantors and the
Purchasers with respect to the

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subject matter hereof and thereof, and there are no promises, undertakings,
representations or warranties by the Purchasers relative to subject matter
hereof and thereof not expressly set forth or referred to herein or in the other
Transaction Documents.

(k)                                   Governing Law. THIS GUARANTEE SHALL BE
GOVERNED BY, AND CONSTRUED AND INTERPRETED IN ACCORDANCE WITH, THE LAW OF THE
STATE OF NEW YORK WITHOUT REGARD TO ANY PRINCIPLES OF CONFLICTS OF LAWS.

(l)                                      Submission to Jurisdictional; Waiver.
Each Guarantor hereby irrevocably and unconditionally:

(i)                                      submits for itself and its property in
any legal action or proceeding relating to this Guarantee and the other
Transaction Documents to which it is a party, or for recognition and enforcement
of any judgment in respect thereof, to the non-exclusive general jurisdiction of
the Courts of the State of New York, located in New York County, New York, the
courts of the United States of America for the Southern District of New York,
and appellate courts from any thereof;

(ii)                                   consents that any such action or
proceeding may be brought in such courts and waives any objection that it may
now or hereafter have to the venue of any such action or proceeding in any such
court or that such action or proceeding was brought in an inconvenient court and
agrees not to plead or claim the same;

(iii)                                agrees that service of process in any such
action or proceeding may be effected by mailing a copy thereof by registered or
certified mail (or any substantially similar form of mail), postage prepaid, to
such Guarantor at its address referred to in the Purchase Agreement most
recently entered into by the applicable Purchaser or at such other address of
which the Purchasers shall have been notified pursuant thereto;

(iv)                               agrees that nothing herein shall affect the
right to effect service of process in any other manner permitted by law or shall
limit the right to sue in any other jurisdiction; and

(v)                                  waives, to the maximum extent not
prohibited by law, any right it may have to claim or recover in any legal action
or proceeding referred to in this Section any special, exemplary, punitive or
consequential damages.

(m)                                Acknowledgements.  Each Guarantor hereby
acknowledges that:

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(i)                                      it has been advised by counsel in the
negotiation, execution and delivery of this Guarantee and the other Transaction
Documents to which it is a party;

(ii)                                   the Purchasers have no fiduciary
relationship with or duty to any Guarantor arising out of or in connection with
this Guarantee or any of the other Transaction Documents, and the relationship
between the Guarantors, on the one hand, and the Purchasers, on the other hand,
in connection herewith or therewith is solely that of debtor and creditor; and

(iii)                                no joint venture is created hereby or by
the other Transaction Documents or otherwise exists by virtue of the
transactions contemplated hereby among the Guarantors and the Purchasers.

(n)                                  Additional Guarantors.  The Company shall
cause each of its subsidiaries formed or acquired on or subsequent to the date
hereof to become a Guarantor for all purposes of this Guarantee by executing and
delivering an
Assumption Agreement in the form of Annex 1 hereto.

(o)                                  Release of Guarantors. Subject to Section
2.6, each Guarantor will be released from all liability hereunder concurrently
with the repayment in full of all amounts owed under the Purchase Agreements,
the Debentures and the other Transaction Documents.

(p)                                  Seniority. The Obligations of each of the
Guarantors hereunder rank senior in priority to any other Indebtedness (as
defined in the Purchase Agreements) of such Guarantor.

(q)                                  Waiver of Jury Trial. EACH GUARANTOR AND,
BY ACCEPTANCE OF THE BENEFITS HEREOF, THE PURCHASERS, HEREBY IRREVOCABLY AND
UNCONDITIONALLY WAIVE TRIAL BY JURY IN ANY LEGAL ACTION OR PROCEEDING RELATING
TO THIS GUARANTEE AND FOR ANY COUNTERCLAIM THEREIN.

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IN WITNESS WHEREOF, each of the undersigned has caused this Guarantee
to be duly executed and delivered as of the date first above written.

 

[SUBSIDIARY]

 

 

 

 

 

 

 

 

By:

 

 

 

 

Name:

 

 

Title:

 

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SCHEDULE 1

GUARANTORS

The following are the names, notice addresses and jurisdiction of organization
of each Guarantor.

 

 

 

COMPANY

 

 

 

JURISDICTION OF

 

OWNED BY

 

 

 

INCORPORATION

 

PERCENTAGE

 

   

 

   

 

   

 

   

 

   

 

   

 

   

 

   

 

   

 

 

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Annex 1 to

SUBSIDIARY GUARANTEE

ASSUMPTION AGREEMENT, dated as of                 ,               made by
                                                         , a
                              corporation (the “Additional Guarantor”), in favor
of the Purchasers pursuant to the Purchase Agreement referred to below. All
capitalized terms not defined herein shall have the meaning ascribed to them in
such Purchase Agreement.

WITNESSETH:

WHEREAS, [COMPANY], a [            corporation (the “Company”) and the
Purchasers have entered into a Securities Purchase Agreement, dated as of
[            , 2007 (as amended, supplemented or otherwise modified from time to
time, the “Purchase Agreement”);

WHEREAS, in connection with the Purchase Agreement, the Company and its
Subsidiaries (other than the Additional Guarantor) have entered into the
Subsidiary Guarantee, dated as of [                   , 2007 (as amended,
supplemented or otherwise modified from time to time, the “Guarantee”) in favor
of the Purchasers;

WHEREAS, the Purchase Agreement requires the Additional Guarantor to become a
party to the Guarantee; and

WHEREAS, the Additional Guarantor has agreed to execute and deliver this
Assumption Agreement in order to become a party to the Guarantee;

NOW, THEREFORE, IT IS AGREED:

1.                                        Guarantee. By executing and delivering
this Assumption Agreement, the Additional Guarantor, as provided in Section 5(n)
of the Guarantee, hereby becomes a party to the Guarantee as a Guarantor
thereunder with the same force and effect as if originally named therein as a
Guarantor and, without limiting the generality of the foregoing, hereby
expressly assumes all obligations and liabilities of a Guarantor thereunder. The
information set forth in Annex 1-A hereto is hereby added to the information set
forth in Schedule 1 to the Guarantee. The Additional Guarantor hereby represents
and warrants that each of the representations and warranties contained in
Section 3 of the Guarantee is true and correct on and as the date hereof as to
such Additional Guarantor (after giving effect to this Assumption Agreement) as
if made on and as of such date.

2.                                        Governing Law. THIS ASSUMPTION
AGREEMENT SHALL BE GOVERNED BY, AND CONSTRUED AND INTERPRETED IN ACCORDANCE
WITH, THE LAW OF THE STATE OF NEW YORK.

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IN WITNESS WHEREOF, the undersigned has caused this Assumption Agreement to be
duly executed and delivered as of the date first above written.

 

 

[ADDITIONALGUARANTOR]

 

 

 

 

 

By:

 

 

 

 

Name:

 

 

Title:

 

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