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                                                                   Exhibit 3.115


                                   BYLAWS OF
                AUTOMOTIVE SATELLITE TELEVISION NETWORK, INC.*

                                  ARTICLE I.

                                    OFFICES

     Section 1. Registered Office and Agency. The registered office of the
Corporation shall be 1626-0 Dallas Parkway, Suite 120, Dallas, Texas 75248. The
name of its registered agent at such address is Carl Westcott. ** Amended
January 4, 1990.

     Section 2. Other Offices. The Corporation may have, in addition to its
registered office, offices and places of business at such places, both within
and without the State of Texas, as the Board of Directors may from time to time
determine or the business of the Corporation may require.

                                  ARTICLE II.

                             SHAREHOLDERS MEETINGS

     Section 1. Annual Meeting. An annual meeting of the shareholders shall be
held at such time as the Board of Directors may decide, at which they shall
elect a Board of Directors and transact such other business as may properly be
brought before the meeting.

     Section 2. Special Meetings. Special meetings of the shareholders, for any
purpose or purposes, unless otherwise prescribed by statute or by the Articles
of Incorporation or by these Bylaws, may be called by the Chairman of the Board,
the President, the Board of Directors, or the holders of not less than one-tenth
in number of all the shares entitled to vote at the meetings.

     Section 3. Place of Meetings. Meetings of shareholders shall be held at
such places, within or without the State of Texas, as may from time to time be
fixed by the Board of Directors or as shall be specified or fixed in the
respective notices or waivers of notice thereof.

     Section 4. Voting List. The officer or agent having charge of the stock
transfer books for shares of the Corporation shall
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make, at least ten (10) days before each meeting of shareholders, a complete
list of the shareholders entitled to vote at such meeting or any adjournment
thereof arranged in alphabetical order, with the address of and the number of
shares held by each, which list, for a period of ten (10) days prior to such
meeting, shall be kept on file at the registered office of the Corporation and
shall be subject to inspection by any shareholder at any time during usual
business hours. Such list shall also be produced and kept open at the time and
place of the meeting and shall be subject to the inspection of any shareholder
during the whole time of the meeting.

     Section 5. Notice of Meetings. Written or printed notice stating the place,
day and hour of each meeting of the shareholders and, in case of a special
meeting, the purpose or purposes for which the meeting is called, shall be
delivered not less than ten (10) nor more than fifty (50) days before the date
of the meeting, either personally or by mail, by or at the direction of the
President, the Secretary, or the body, officer or person calling the meeting, to
each shareholder of record entitled to vote at the meeting. If mailed, such
notice shall be deemed to be delivered when deposited in the United States Mail
addressed to the shareholder at his address as it appears on the stock transfer
books of the Corporation, with postage thereon prepaid.

      Section 6. Quorum of Shareholders. The holders of a majority of the shares
issued and outstanding and entitled to vote thereat, present in person or
represented by proxy, shall be requisite and shall constitute a quorum at each
meeting of shareholders for the transaction of business except as otherwise
provided by statute or by the Articles of Incorporation. If, however, such
quorum shall not be present or represented at any meeting of the shareholders,
the shareholders entitled to vote thereat, present in person or represented by
proxy, shall have power to adjourn the meeting from time to time, without notice
other than announcement at the meeting, until a quorum shall be present or
represented. At any such adjourned meeting at which a quorum shall be present or
represented, any business may be transacted which might have been transacted at
the meeting as originally notified. When a quorum is present at any meeting, the
vote of the holders of a majority of the shares entitled to vote and present in
person or represented by proxy shall be the


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<PAGE>

act of the shareholders' meeting, unless the vote of a greater number is
required by statute, the Articles of Incorporation or these Bylaws, in which
case the vote of such greater number shall be requisite to constitute the act of
the meeting. The shareholders present or represented at a duly organized meeting
and entitled to vote thereat may continue to transact business until
adjournment, notwithstanding the withdrawal of enough shareholders to leave less
than a quorum.

     Section 7. Voting of Shares. Each outstanding share, regardless of class,
shall be entitled to one vote on each matter submitted to a vote at a meeting of
shareholders, except as and to the extent otherwise provided by statute or the
Articles of Incorporation. At any meeting of the shareholders every shareholder
having the right to vote shall be entitled to vote either in person or by proxy
executed in writing by such shareholder or by his duly authorized
attorney-in-fact. No proxy shall be valid after eleven (11) months from the date
of its execution unless otherwise provided in the proxy. Each proxy shall be
revocable unless expressly provided therein to be irrevocable and unless
otherwise made irrevocable by law. Each proxy shall be filed with the Secretary
of the Corporation prior to or at the time of the meeting. Any vote may be taken
viva voce or by show of hands unless someone entitled to vote objects, in which
case written ballots shall be used.

     Section 8. Action without Meeting. Any action required by statute to be
taken at a meeting of the shareholders, or any action which may be taken at a
meeting of the shareholders, may be taken without a meeting if a consent in
writing, setting forth the action so taken, shall be signed by all of the
shareholders entitled to vote with respect to the subject matter thereof and
such consent shall have the same force and effect as a unanimous vote of the
shareholders. Any such signed consent, or a signed copy thereof, shall be placed
in the minute book of the Corporation.

     Section 9. Telephone Meetings. Shareholders may participate in and hold a
meeting of shareholders by means of conference telephone or similar
communications equipment by means of which all persons participating in the
meeting can hear each other, and participation in a meeting pursuant to this
section shall constitute presence in person at such meeting, except where a


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person participates in the meeting for the express purpose of objecting to the
transaction of any business on the grounds that the meeting is not lawfully
called or convened.

                                 ARTICLE III.

                              BOARD OF DIRECTORS

     Section 1. Management of the Corporation. The business and affairs of the
Corporation shall be managed by its Board of Directors, which may exercise all
such powers of the Corporation and do all such lawful acts and things as are not
by statute or by the Articles of Incorporation or by these Bylaws directed or
required to be exercised or done by the shareholders.

     Section 2. Number and Qualifications. The Board of Directors shall consist
of one or more directors. The number of directors shall be fixed from time to
time by resolution of the Board of Directors. The number of directors may be
increased or decreased from time to time by the Board of Directors, except that
no decrease shall have the effect of shortening the term of any incumbent
director. Any directorship to be filled by reason of any increase in the number
of directors may be filled by election at any annual meeting or at a special
meeting of shareholders called for that purpose or may be filled by the Board of
Directors for a term of office continuing only until the next election of one or
more directors by the shareholders; provided that the Board of Directors may not
fill more than two such directorships during the period between any two
successive annual meetings of shareholders. None of the directors need be
shareholders of the Corporation or residents of the State of Texas.

     Section 3. Election and Term of Office. At each annual meeting of
shareholders the shareholders shall elect directors to hold office until the
next succeeding annual meeting. At each election, the persons receiving the
greatest number of votes shall be the directors. Each director elected shall
hold office for the term for which he is elected and until his successor shall
have been elected and shall have qualified or until his earlier death,
resignation, retirement, disqualification or removal.

     Section 4. Removal. Any director may be removed either for


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<PAGE>

or without cause to any special or annual meeting of shareholders, by the
affirmative vote of a majority in number of shares of the shareholders present
in person or by proxy at such meeting and entitled to vote for the election of
such director if notice of intention to act upon such matter shall have been
given in the notice calling such meeting.

      Section 5. Vacancies. Any vacancy occurring in the Board of Directors may
be filled by election at an annual or special meeting of shareholders called for
that purpose or by an affirmative vote of a majority of the remaining directors
though less than a quorum of the board of directors. A director elected to fill
a vacancy shall be elected for the unexpired term of his predecessor in office.

     Section 6. Place of Meetings. Meetings of the Board of Directors, annual,
regular or special, may be held either within or without the State of Texas.

      Section 7. Annual Meetings. The first meeting of each newly elected Board
shall be held for the purpose of organization and the transaction of any other
business without notice immediately following the annual meeting of
shareholders, and at the same place, unless by unanimous consent of the
directors then elected and serving such time or place shall be changed.

      Section 8. Regular Meetings. Regular meetings of the Board of Directors,
of which no notice shall be necessary, shall be held at such times and places as
may be fixed from time to time by resolution adopted by the Board and
communicated to all directors. Except as otherwise provided by statute, the
Articles of Incorporation or these Bylaws, any and all business may be
transacted at any regular meeting.

      Section 9. Special Meetings. Special meetings of the Board of Directors
may be called by the Chairman of the Board, the President or the Secretary on
twenty-four (24) hours notice to each director, either personally or by mail or
by telegram. Except as may be otherwise expressly provided by statute or by the
Articles of Incorporation or by these Bylaws, neither the business to be
transacted at, nor the purpose of, any meeting of the Board of Directors need be
specified in the notice or waiver of notice of such meeting.


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<PAGE>

     Section 10. Quorum and Manner of Acting. At all meetings of the Board of
Directors the presence of a majority of the number of directors fixed by these
Bylaws shall be necessary and sufficient to constitute a quorum for the
transaction of business except as otherwise provided by statute, the Articles of
Incorporation or these Bylaws. The act of a majority of the directors present at
a meeting at which a quorum is present shall be the act of the Board of
Directors unless the act of a greater number is required by statute, the
Articles of Incorporation or these Bylaws, in which case the act of such greater
number shall be requisite to constitute the act of the Board. If a quorum shall
not be present at any meeting of directors, the directors present thereat may
adjourn the meeting from time to time, without notice other than announcement at
the meeting, until a quorum shall be present. At any such adjourned meeting any
business may be transacted which might have been transacted at the meeting as
originally convened.

     Section 11. Action without a Meeting. Any action required or permitted to
be taken at a meeting of the Board of Directors may be taken without a meeting
if a consent in writing, setting forth the action so taken, is signed by all
members of the Board of Directors, and such consent shall have the same force
and effect as a unanimous vote at a meeting. Any such signed consent, or a
signed copy thereof, shall be placed in the minute book of the Corporation.

     Section 12. Directors' Compensation. The Board of Directors shall have
authority to determine , time to time, the amount of compensation, if any, which
shall be paid to its members for their services as directors. The Board shall
also have power in its discretion to provide for and to pay to directors
rendering services to the Corporation not ordinarily rendered by directors as
such, special compensation appropriate to the value of such services as
determined by the Board from time to time. Nothing herein contained shall be
construed to preclude any director from serving the Corporation in any other
capacity and receiving compensation therefor.

     Section 13. Procedure. The Board of Directors shall keep regular minutes of
its proceedings. The minutes shall be placed in the minute book of the
Corporation.


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<PAGE>

     Section 14. Mandatory Indemnification and Advancement of Directors and
officers.*** Adopted January 4, 1990.

                                  ARTICLE IV.

                                    NOTICES

     Section 1 Manner of Giving Notice. Whenever, under the provisions of the
statutes or of the Articles of Incorporation or of these Bylaws, notice is
required to be given to any director or shareholder and no provision is made as
to how such notice shall be given, it shall not be construed to mean personal
notice, but any such notice may be given in writing by mail, postage prepaid,
addressed to such director or shareholder at his address as it appears on the
records or (in the case of a shareholder) the stock transfer books of the
Corporation. Any notice required or permitted to be given by mail shall be
deemed to be delivered at the time when the same shall be deposited in the
United States mails as aforesaid.

     Section 2. Waiver of Notice. Whenever any notice is required to be given to
any shareholder or director of the Corporation under the provisions of the
statutes or of the Articles of Incorporation or of these Bylaws, a waiver
thereof in writing signed by the person or persons entitled to such notice,
whether before or after the time stated therein, shall be deemed equivalent to
giving of such notice.

                                  ARTICLE V.

                              EXECUTIVE COMMITTEE

     Section 1. Constitution and Powers. The Board of Directors, by resolution
adopted by affirmative vote of a majority of the entire board, may designate two
(2) or more directors to constitute an Executive Committee, which Executive
Committee shall have and may exercise, when the Board is not in session, all of
the authority and powers of the Board of Directors in the business and affairs
of the Corporation, even though such authority and powers be herein provided or
directed to be exercised by a designated officer of the Corporation; provided
that the foregoing shall not be construed as authorizing action by the Executive
Committee with respect to any action which by


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<PAGE>

statute, the Articles of Incorporation or these Bylaws is required to be taken
by vote of a specified proportion of the number of directors fixed by these
Bylaws, or any other action required or specified by the Texas Business
Corporation Act or other applicable law or by these Bylaws or by the Articles of
Incorporation to be taken by the Board of Directors, as such. So far as
practicable, members of the Executive Committee shall be appointed by the Board
of Directors at its first meeting after each annual meeting of shareholders and,
unless sooner discharged by affirmative vote of a majority of the entire Board,
shall hold office until their respective successors are appointed and qualify or
until their earlier respective removals, deaths, resignations, retirements, or
disqualifications.

     Section 2. Meetings. Regular meetings of the Executive Committee, of which
no notice shall be necessary, shall be held at such times and places as may be
fixed from time to time by resolution adopted by affirmative vote of a majority
of the whole Committee and communicated to all of the members thereof. Special
meetings of the Executive Committee may be called by the Chairman of the Board,
the President or any member thereof at any time on twenty-four (24) hours'
notice to each member, either personally or by mail or telegram. Except as may
be otherwise expressly provided by statute or by the Articles of Incorporation
or by these Bylaws, neither the business to be transacted at, nor the purpose
of, any meeting of the Executive Committee need be specified in the notice or
waiver of notice of such meeting. A majority of the Executive Committee shall
constitute a quorum for the transaction of business, and the act of a majority
of those present at any meeting at which a quorum is present shall be the act of
the Executive Committee.

     Section 3. Records. The Executive Committee shall keep a record of its acts
and proceedings and shall report the same, from time to time, to the Board of
Directors. The Secretary of the Corporation, or, in his absence, an Assistant
Secretary, shall act as secretary of the Executive Committee or the Committee
may, in its discretion, appoint its own secretary.

     Section 4. Vacancies. Any vacancy in the Executive Committee may be filled
by affirmative vote of a majority of the entire Board.


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<PAGE>

                                  ARTICLE VI.

                         OTHER COMMITTEES OF THE BOARD

     Section 1. Other Committees. The Board of Directors may, by resolution
adopted by affirmative vote of a majority of the entire Board, designate two or
more directors to constitute another committee or committees for any purpose;
provided, that any such other committee or committees shall have and may
exercise only the power. of recommending action to the Board of Directors and
the Executive Committee and of carrying out and implementing any instructions or
any policies, plans and programs theretofore approved, authorized and adopted by
the Board of Directors or the Executive Committee.**** Amended on January 4,
1990.

                                 ARTICLE VII.

          OFFICERS, EMPLOYEES AND AGENTS: POWERS AND DUTIES

     Section 1. Elected Officers. The elected officers of the Corporation shall
be a Chairman of the Board (if the Board of Directors shall determine the
election of such officer to be appropriate), a President, one or more Vice
Presidents as may be determined from time to time by the Board (and, in the case
of each such Vice President, with such descriptive title, if any, as the Board
of Directors shall deem appropriate), a Secretary, and a Treasurer. The Chairman
of the Board, if any, shall be a member of the Board of Directors. No other
elected officer of the Corporation need be a member of the Board of Directors.

     Section 2. Election. So far as is practicable, all elected officers shall
be elected by the Board of Directors at its first meeting after each annual
meeting of shareholders.

     Section 3. Appointive Officers. The Board of Directors may also appoint one
or more Assistant Secretaries and Assistant Treasurers and such other officers
and assistant officers and agents (none of whom need be a member of the Board)
as it shall from time to time deem necessary, who will exercise such powers and
perform such duties as shall be set forth in these Bylaws or determined from
time to time by the Board of Directors or the Executive Committee.


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<PAGE>

     Section 4. Two or More Offices. Any two (2) or more offices may be held by
the same person.

     Section 5. Compensation. The compensation of all officers of the
Corporation shall be fixed from time to time by the Board of Directors or the
Executive Committee. The Board of Directors or the Executive Committee may from
time to time delegate to the President the authority to fix the compensation of
any or all of the other officers of the Corporation.

     Section 6. Term of Office; Removal; Filling of Vacancies. Each elected
officer of the Corporation shall hold office until his successor is chosen and
qualified in his stead or until his earlier death, resignation, retirement,
disqualification or removal from office. Each appointive officer shall hold
office at the pleasure of the Board of Directors without the necessity of
periodic reappointment. Any officer or agent elected or appointed by the Board
of Directors may be removed at any time by the Board of Directors whenever in
its judgment the best interests of the Corporation will be served thereby, but
such removal shall be without prejudice to the contract rights, if any, of the
person so removed. Election or appointment of an officer or agent will not of
itself create contract rights. If the office of any officer becomes vacant for
any reason, the vacancy may be filled by the Board of Directors.

     Section 7. Chairman of the Board. The Chairman of the Board, if a person is
elected to such office by the Board of Directors shall preside when present at
all meetings of the shareholders and of the Board of Directors. He shall advise
and counsel the President and other officers of the Corporation and shall
exercise such powers and perform such duties as shall be assigned to or required
of him from time to time by the Board of Directors or the Executive Committee.

     Section 8. President. The President shall be the chief executive officer of
the Corporation and, subject to the provisions of these Bylaws, shall have
general supervision of the affairs of the Corporation and shall have general and
active control of all its business. In the absence of the Chairman of the Board
or if such officer shall not have been elected or be serving, the President
shall preside when present at meetings of the shareholders and the Board of
Directors. He shall have


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<PAGE>

general authority to execute bonds, deeds and contracts in the name of the
Corporation and to affix the corporate seal thereto; to sign stock certificates;
to cause the employment or appointment of such employees and agents of the
Corporation as the proper conduct or operations may require and to fix their
compensation, subject too the provisions of these Bylaws; to remove or suspend
any employee or agent who shall have been employed or appointed under his
authority or under authority of an officer subordinate to him; to suspend for
cause, pending final action by the authority which shall have elected or
appointed him, any officer subordinate to the President; and in general to
exercise all the powers usually appertaining to the office of president of a
corporation, except as otherwise provided by statute, the Articles of
Incorporation or these Bylaws. In the absence or disability of the President,
his duties shall be performed and his powers may be exercised by the Vice
Presidents in order of their seniority, unless otherwise determined by the
Chairman of the Board, the President, the Board of Directors or the Executive
Committee.

     Section 9. Vice Presidents. Each Vice President shall have such titles as
may be prescribed by the Board of Directors, and shall generally assist the
President and shall have such powers and perform such duties and services as
shall from time to time be prescribed or delegated to him by the President, the
Board of Directors or the Executive Committee.

     Section 10. Treasurer. The Treasurer shall have the care and custody of all
monies, funds and securities of the Corporation; shall deposit or cause to be
deposited all such funds in and with such depositories as the Board of Directors
or the Executive Committee shall from time to time direct or as shall be
selected in accordance with procedure established by the Board or the Executive
Committee; shall advise upon all terms of credit granted by the Corporation; and
shall be responsible for the collection of all its accounts and shall cause to
be kept full and accurate accounts of all receipts and disbursements of the
Corporation. He shall have the power to endorse for deposit or collection or
otherwise all checks, drafts, notes, bills of exchange or other commercial
papers payable to the Corporation and to give proper receipts or discharges for
all payments to the Corporation. The Treasurer shall generally perform all the
duties usually appertaining to the office of treasurer of a


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corporation. In the absence or disability of the Treasurer his duties shall be
performed and his powers may be exercised by the Assistant Treasurers in the
order of their seniority, unless otherwise determined by the Treasurer, the
Chairman of the Board, the President, the Board of Directors or the Executive
Committee. if required by the Board of Directors, he shall give the Corporation
a bond in such form, in such sum, and with such surety or sureties as shall be
satisfactory to the Board for the faithful performance of the duties of his
office.

     Section 11. Assistant Treasurers. Each Assistant Treasurer shall generally
assist the Treasurer and shall have such powers and perform such duties and
services as shall from time to time be prescribed or delegated to him by the
Treasurer, the Chairman of the Board, the President, the Board of Directors, or
the Executive Committee.

     Section 12. Secretary. The Secretary shall see that notice is given of all
meetings of the shareholders and special meetings of the Board of directors and
shall keep and attest true records of all proceedings at all meetings of the
shareholders and the Board. He shall have charge of the corporate seal and have
authority to attest any and all instruments or writings to which the same may be
affixed. He shall keep and account for all books, documents, papers and records
of the Corporation except those for which some other officer or agent is
properly accountable. He shall have authority to sign stock certificates and
shall generally perform all the duties usually appertaining to the office of
secretary of a corporation. In the absence or disability of the Secretary, his
duties shall be performed and his powers may be exercised by the Assistant
Secretaries in the order of their seniority, unless otherwise determined by the
Secretary, the Chairman of the Board, the President, the Board of Directors or
the Executive Committee.

     Section 13. Assistant Secretaries. Each Assistant Secretary shall generally
assist the Secretary and shall have such powers and perform such duties and
services as shall from time to time be prescribed or delegated to him by the
Secretary, the Chairman of the Board, the President, the Board of Directors or
the Executive Committee.


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<PAGE>

     Section 14. Additional Powers and Duties. In addition to the foregoing
especially enumerated duties, services and powers, the several elected and
appointive officers of the Corporation shall perform such other duties and
services and exercise such further powers as may be provided by statute, the
Articles of Incorporation or these Bylaws or as the Board of Directors or the
Executive Committee may from time to time determine or as may be assigned to
them by any competent superior officer.

                                 ARTICLE VIII.

                          STOCK AND TRANSFER OF STOCK

     Section 1. Certificates Representing Shares. Certificates in such form as
may be determined by the Board of Directors and as shall conform to the
requirements of the statutes, the Articles of Incorporation and these Bylaws
shall be delivered representing all shares to which shareholders are entitled.
Such certificates shall be consecutively numbered and shall be entered in the
books of the Corporation as they are issued. Each certificate shall state on the
face thereof that the Corporation is organized under the laws of Texas, the
holder's name, the number and class of shares which such certificate represents,
the par value of such shares or a statement that such shares are without par
value, and such other matters as may be required by law. Each certificate shall
be signed by the President or a Vice President and the Secretary or an Assistant
Secretary and may be sealed with the seal of the Corporation or a facsimile
thereof. If any certificate is countersigned by a transfer agent or registered
by a registrar, either of which is other than the Corporation or an employee of
the Corporation, the signature of any such officer may be facsimile.

     Section 2. Lost Certificates. The Board of Directors, the Executive
Committee, the President, or such other officer or officers of the Corporation
as the Board of Directors may from time to time designate, in its or his
discretion may direct a new certificate or certificates representing shares to
be issued in place of any certificate or certificates theretofore issued by the
Corporation alleged to have been lost, stolen or destroyed, upon the making of
an affidavit of that fact by the person claiming the certificate or certificates
to be lost, stolen or destroyed. When authorizing such issue of a new
certificate or


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<PAGE>

certificates, the Board of Directors, the Executive Committee, the President, or
such other officer or officers, in its or his or their discretion and as a
condition precedent to the issuance thereof, may require the owner of such lost,
stolen or destroyed certificate or certificates, or his legal representative, to
advertise the same in such manner as it or he shall require and/or give the
Corporation a bond in such form, in such sum, and with such surety or sureties
as it or he may direct as indemnity against any claim that may be made against
the Corporation with respect to the certificate or certificates alleged to have
been lost, stolen or destroyed.

     Section 3. Transfers of Shares. Shares of stock shall be transferable only
on the books of the Corporation by the holder thereof in person or by his duly
authorized attorney. Upon surrender to the Corporation or the transfer agent of
the Corporation of a certificate representing shares, duly endorsed or
accompanied by proper evidence of succession, assignment or authority to
transfer, with all required stock transfer tax stamps affixed thereto and
canceled or accompanied by sufficient funds to pay such taxes, it shall be the
duty of the Corporation or the transfer agent of the Corporation to issue a new
certificate to the person entitled thereto, cancel the old certificate and
record the transaction upon its books.

     Section 4.Registered Shareholders. The Corporation shall be entitled to
treat the holder of record of any share or shares of stock as the holder in fact
thereof and, accordingly, shall not be bound to recognize any equitable or other
claim to or interest in such share or shares on the part of any other person,
whether or not it shall have express or other notice thereof, except as
otherwise provided by Law.

                                  ARTICLE IX.

                                 MISCELLANEOUS

     Section 1. Dividends. Dividends upon the outstanding shares of the
Corporation, subject to the provisions of the statutes and of the Articles of
Incorporation, may be declared by the Board of Directors at any annual, regular
or special meeting. Dividends may be declared and paid in cash, in property, or
in shares of the Corporation, or in any combination thereof. The declaration


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<PAGE>

and payment shall be at the discretion of the Board of Directors.

     Section 2. Reserves. There may be created from time to time by resolution
of he Board of Directors, out of the earned surplus of the Corporation, such
reserve or reserves as the directors in their discretion think proper to provide
for contingencies, or to equalize dividends, or to repair or maintain any
property of the Corporation, or for such other purpose as the directors shall
think beneficial to the Corporation, and the directors may modify or abolish any
such reserve in the manner in which it was created.

     Section 3. Signature of Negotiable Instruments. All bills, notes, checks or
other instruments for the payment of money shall be signed or countersigned by
such officer, officers, agent or agents and in such manner as are permitted by
these Bylaws or in such manner as, from time to time, may be prescribed by
resolution (whether general or special) of the Board of Directors or the
Executive Committee.

     Section 4. Fiscal Year. The fiscal year of the Corporation shall be
determined by the Board of Directors from time to time.

     Section 5. Seal. The Corporation's seal shall be in such form as shall be
adopted and approved from time to time by the Board of Directors. The seal may
be used by causing it, or a facsimile thereof, to be impressed, affixed,
imprinted or in any manner reproduced.

     Section 6. Closing of Transfer Books and Fixing Record Date. For the
purpose of determining shareholders entitled to notice of or to vote at any
meeting of shareholders or any adjournment thereof, or entitled to receive
payment of any dividend, or in order to make a determination of shareholders for
any other proper purpose, the Board of Directors may provide that the stock
transfer books of the Corporation shall be closed for a stated period but not to
exceed, in any case, fifty (50) days. If the stock transfer books shall be
closed for the purpose of determining shareholders entitled to notice of or to
vote at a meeting of shareholders, such books shall be closed at least ten (10)
days immediately preceding such meeting. In lieu of closing the stock transfer
books, the Board of Directors may fix in advance a date as the record date for
any such determination of


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<PAGE>

shareholders, such date in any case to be not more than fifty (50) days and, in
case of a meeting of shareholders, not less than ten (10) days prior to the date
on which the particular action,requiring such determination of shareholders is
to be taken. If the stock transfer books are not closed and no record date is
fixed for the determination of shareholders entitled to notice of or to vote at
a meeting of shareholders, or shareholders entitled to receive payment of a
dividend, the date on which notice of the meeting is mailed or the date on which
the resolution of the Board of Directors declaring such dividend is adopted, as
the case may be, shall be the record date for such determination of
shareholders. When a determination of shareholders entitled to vote at any
meeting has been made as provided in this section, such determination shall
apply to any adjournment thereof except where the determination has been made
through the closing of stock transfer books and the stated period of closing has
expired.

     Section 7. Surety Bonds. Such officers and agents of the Corporation (if
any) as the Chairman of the Board or the Board of Directors may direct, from
time to time, shall be bonded for the faithful performance of their duties and
for the restoration to the Corporation, in case of their death, resignation,
retirement, disqualification or removal from office, of all books, papers,
vouchers, money and other property of whatever kind in their possession or under
their control belonging to the Corporation, in such amounts and by such surety
companies as the Chairman of the Board, the Board of Directors, or the Executive
Committee may determine. The premiums on such bonds shall be paid by the
Corporation, and the bonds so furnished shall be in the custody of the
Secretary.

                                  ARTICLE X.

                                  AMENDMENTS

     Section 1. These Bylaws may be altered, amended or repealed or new Bylaws
may be adopted at any meeting of the Board of Directors at which a quorum is
present, provided notice of the proposed alteration, amendment or repeal or
adoption be contained in the notice of such meeting.


                                       16
<PAGE>

     I, Ron Gardner, hereby certify that I am the duly elected and qualified
Secretary of Automotive Satellite Television Network, Inc., and that the
foregoing is a true and correct copy of the Bylaws of Automotive Satellite
Television Network, Inc., adopted by unanimous consent of the Board of Directors
of the Corporation as of the 19th day of May, 1986.

     In Witness Whereof, I have hereunto affixed my name as Secretary as of this
19th day of May, 1986.

                                  Ron Gardner


                                       17
<PAGE>

                           BYLAW AMENDMENTS/CHANGES

     * The name of the Corporation was changed to Westcott Communications, Inc.,
effective as of July 25, 1988.

     ** Article I, Section 1 is amended to read in its entirety as follows:

          Section 1. Registered Office and Agent. The registered office of the
Corporation shall be 1303 Marsh Lane, Carrollton, Texas 75006. The name of its
registered agent as such address is Carl Westcott.

     *** A new Section 14, Article III is added which Section 14 reads in its
entirety as follows:

          Section 14. Mandatory Indemnification and Advancement of Expenses for
Directors and Officers. The Corporation shall indemnify any person who was, is,
or is threatened to be made a named defendant or respondent in a proceeding (as
hereinafter defined) because the person (i) is or was a director or officer of
the Corporation or (ii) while a director or officer of the Corporation, is or
was serving at the request of the Corporation as a director, officer, partner,
venturer, proprietor, trustee, employee, agent, or similar functionary of
another foreign or domestic corporation, partnership, joint venture, sole
proprietorship, trust, employee benefit plan, or other enterprise, to the
fullest extent that a corporation may grant indemnification to a director under
the Texas Business Corporation Act, as the same exists or may hereafter be
amended. Such right shall be a contract right and as such shall run to the
benefit of any director or officer who is elected and accepts the position of
director or officer of the Corporation or elects to continue to serve as a
director or officer of the Corporation while this Section 14 is in effect. Any
repeal or amendment of this Section 14 shall be prospective only and shall not
limit the rights of any such director or officer or the obligations of the
Corporation with respect to any claim arising from or related to the services of
such director or officer in any of the foregoing capacities prior to any such
repeal or amendment of this Section 14. Such right shall include the right to be
paid or reimbursed by the Corporation for expenses incurred in defending any
such proceeding in advance of its final disposition to the maximum
<PAGE>

extent permitted under the Texas Business Corporation Act, as the same exists or
may hereafter be amended. If a claim for indemnification or advancement of
expenses hereunder is not paid in full by the Corporation within 90 days after a
written claim has been received by the Corporation, the claimant may at any time
thereafter bring suit against the Corporation to recover the unpaid amount of
the claim, and if successful in whole or in part, the claimant shall be entitled
to be paid also the expenses of prosecuting such claim. it shall be a defense to
any such action that such indemnification or advancement of costs of defense are
not permitted under the Texas Business Corporation Act, but the burden of
proving such defense shall be on the Corporation. Neither the failure of the
Corporation (including its Board of Directors or any committee thereof, special
legal counsel, or shareholders) to have made its determination prior to the
commencement of such action that indemnification of, or advancement of costs of
defense to, the claimant is permissible in the circumstances nor an actual
determination by the Corporation (including its Board of Directors or any
committee thereof, special legal counsel, or shareholders) that such
indemnification or advancement is not permissible, shall be a defense to the
action or create a presumption that such indemnification or advancement is not
permissible. In the event of the death of any person having a right of
indemnification under the foregoing provisions, such right shall inure to the
benefit of his heirs, executors, administrators, and personal representatives.
The rights conferred above shall not be exclusive of any other right which any
person may have or hereafter acquire under any statute, bylaw, resolution of
shareholders or directors, agreement, or otherwise.

     The Corporation may additionally indemnify any person covered by the grant
of mandatory indemnification contained above to such further extent as is
permitted by law and may indemnify any other person to the fullest extent
permitted by law.

     To the extent permitted by then applicable law, the grant of mandatory
indemnification to any person pursuant to this Section 14 shall extend to
proceedings involving the negligence of such person.

     As used herein, the term "proceeding" means any threatened, pending, or
completed action, suit, or proceeding, whether civil, criminal, administrative,
arbitrative, or investigative, any appeal in such an action, suit, or
proceeding, and any inquiry or
<PAGE>

investigation that could lead to such an action, suit, or proceeding.

**** Article VI, Section 1 is amended to read in its entirety as follows:

          Section 1. Other Committees. The Board of Directors may, by resolution
adopted by affirmative vote of a majority of the entire Board, designate two or
more directors to constitute another committee or committees for any purpose;
provided, that any such other committee or committees shall have and may
exercise all authority of the Board of Directors and the Executive Committee in
carrying out and implementing any instructions or any policies, plans and
programs theretofore approved, authorized and adopted by the Board of Directors
or the Executive Committee.
<PAGE>

                              AMENDMENT OF BYLAWS

                       OF WESTCOTT COMMUNICATIONS, INC.

                                 AUGUST 3,1993

     RESOLVED, that Section 6 of the Bylaws of the Corporation be amended to
read in its entirety as follows:

     Section 6. Quorum of Shareholders.

     The holders of a majority of the shares issued and outstanding and entitled
     to vote thereat, present in person or represented by proxy, shall be
     requisite and shall constitute a quorum at each meeting of shareholders for
     the transaction of business except as otherwise provided by statute or by
     the Articles of Incorporation. If, however, such quorum shall not be
     present or represented at any meeting of the shareholders, the shareholders
     entitled to vote thereat, present in person or represented by proxy, shall
     have power to adjourn the meeting from time to time, without notice other
     than announcement at the meeting, until a quorum shall be present or
     represented. At any such adjourned meeting at which a quorum shall be
     present or represented, any business may be transacted which might have
     been transacted at the meeting as originally notified. With respect to any
     matter other than the election of directors, the vote of the holders of a
     majority of the shares entitled to vote on, and voted for or against, that
     matter at a meeting of shareholders at which a quorum is present shall be
     the act of the shareholders'meeting, unless the vote of a greater number is
     required by statute, the Articles of Incorporation or these Bylaws, in
     which case the vote of such greater number shall be requisite to constitute
     the act of the meeting. The shareholders present or represented at a duly
     organized meeting and entitled to vote thereat may continue to transact
     business until adjournment, notwithstanding the withdrawal of enough
     shareholders to leave less than a quorum.

     FURTHER RESOLVED, that the President, any Vice-President, and the Secretary
of the Corporation (the "Proper Officers") are each hereby authorized,
empowered, and directed to execute and deliver, for and on behalf and in the
name of the Corporation, the Amendment, together with any other instruments and
documents as any such officer may deem necessary, appropriate, or in the
<PAGE>

best interest of the Corporation;

     FURTHER RESOLVED, that the Proper Officers are, and each hereby is,
authorized, empowered, and directed to make such modifications to, additions to,
deletions from, or changes to the Amendment as such officer may deem necessary
or appropriate or in the best interest of the Company; that execution and
delivery of the Amendment by such officer shall be conclusive evidence of his
approval thereof, and such changes, additions, deletions, or modifications shall
be deemed authorized by the Board of Directors of the Company pursuant to the
terms hereof;

     FURTHER RESOLVED, that the Proper Officers of the Company are authorized to
sign, execute, certify to, verity, acknowledge, deliver, accept, and record any
and all such additional agreements, certificates, documents, reports, and
schedules, and to take, or cause to be taken, any and all such action, in the
name and on behalf of the Company, which shall be required to effect the
Amendment, without limitation to the transaction listed above, or which the
Proper Officers of the Company deem necessary or appropriate or in the best
interest of the Company in order to effect the foregoing resolutions, and such
officer's signature, or such actions taken by such officer, shall be conclusive
evidence that such officer did deem same to be necessary or appropriate and in
the best interest of the Company in order to effect such purposes; and

     FINALLY RESOLVED, that each and every action taken by the Proper Officers
of the Corporation prior to the date of the adoption of the foregoing
resolutions which would have been authorized by the foregoing resolutions but
for the fact that such actions were taken prior to such date, be, and each
hereby is, ratified, approved, confirmed, and adopted.

                                    Phyllis Farragut, Secretary
<PAGE>

                                 AMENDMENT TO

                    BYLAWS OF WESTCOTT COMMUNICATIONS,INC.

     1. Section 4 of Article III of the Bylaws of Westcott Communications, Inc.
(the "Corporation") is hereby amended to read in its entirety as follows:

          Section 4. Removal. Any director may be removed for cause at any
special or annual meeting of shareholders, by the affirmative vote of the
holders of a majority of the outstanding shares entitled by law to vote thereon
if notice of intention to act upon such matter shall have been given in the
notice calling such meeting. No director may be removed without cause.

     2. Article X of the Bylaws of the Corporation is hereby amended by adding a
new Section 2 to such Article X to read in its entirety as follows:

          Section 2. The shareholders of the Corporation may only alter, amend
or repeal these Bylaws or adopt new Bylaws if such alteration, amendment, repeal
or adoption is approved by the affirmative vote of a majority of the outstanding
shares entitled by law to vote thereon.

                                ___________________________
January 9, 1996                 Phyllis Farragut, Secretary