Document:

Exhibit 10.42

                               AMENDMENT NO. 4 TO
             SECOND AMENDED AND RESTATED LOAN AND SECURITY AGREEMENT

         This Amendment No. 4 to Second Amended and Restated Loan and Security
Agreement, dated as of June 29, 2001 (this "Amendment"), is by and among
GUARDIAN INTERNATIONAL, INC., a Florida corporation and successor-in-interest by
domestication under Florida law to Guardian International, Inc., a former Nevada
corporation ("Guardian"), the undersigned Borrowing Subsidiaries (Guardian and
the Borrowing Subsidiaries may be individually referred to herein as a
"Borrower", and collectively as "Borrowers") and HELLER FINANCIAL, INC., a
Delaware corporation ("Lender").

                              W I T N E S S E T H:

         WHEREAS, Borrowers and Lender are parties to that certain Second
Amended and Restated Loan and Security Agreement dated as of February 23, 1998
(as heretofore amended or otherwise modified, the "Loan Agreement"; capitalized
terms not otherwise defined herein have the definitions provided therefor in the
Loan Agreement);

         WHEREAS, Borrowers have requested that Lender amend the Loan Agreement
in certain respects; and

         WHEREAS, Lender has agreed to amend the Loan Agreement subject to the
terms and conditions hereof;

         NOW, THEREFORE, the parties hereto agree as follows:

         1. Amendments. Subject to the satisfaction of the conditions set forth
in Section 3 below, and in reliance on the representations, warranties,
covenants and other agreements contained herein, the Loan Agreement is hereby
amended as follows:

         (a)      Notwithstanding anything to the contrary set forth in
                  subsection 1.2 of the Loan Agreement, the parties hereto agree
                  that all financial statements and other relevant information
                  prepared by Borrowers and delivered to Lender, including
                  without limitation each Compliance Certificate, shall be
                  prepared to reflect the adoption by the Borrowers on or about
                  January 1, 2000 of SAB 101, an accounting policy regarding
                  revenue recognition.

         (b)      Subsection 2.1(A) of the Loan Agreement is hereby amended by
                  amending and restating the defined term "Borrowing Base" set
                  forth in clause (2) thereof as follows:

                  "Borrowing Base" means, as of any date of determination, an
                  amount equal to the aggregate MRI in respect of all Contracts
                  of Borrowers as of the last day of then most recently ended
                  month, multiplied by 21.
<PAGE>

         (c)      Subsection 6.1 of the Loan Agreement is hereby amended by
                  deleting the dollar amount "$500,000" set forth in clause (ii)
                  thereof, and by inserting the dollar amount "$600,000" in lieu
                  thereof.

         (d)      Subsection 6.4 of the Loan Agreement is hereby amended by (x)
                  amending clause (ii) therein to read: "(ii) 3.50:1.0 through
                  June 30, 2001" and (y) by inserting new clause (iii)
                  immediately following clause (ii) therein, which shall read as
                  follows: "(iii) 4.50:1.0 thereafter."

         (e)      Subsection 6.6 of the Loan Agreement is hereby amended by
                  deleting the clause "ten percent (10.0%)" set forth therein,
                  and by inserting in lieu thereof the clause "twelve percent
                  (12.0%)".

         (f)      For purposes of Sections 6.3, 6.4 and 6.5 of the Loan
                  Agreement, EBIDAT and Pro Forma EBIDAT as of any measurement
                  date shall be measured for the three month period most
                  recently preceding such measurement date for which financial
                  information is available, and shall be expressed on an
                  annualized basis.

         (g)      The defined term "Expiry Date" set forth in Annex A to the
                  Loan Agreement is hereby amended by deleting the date "June
                  30, 2002", and by inserting in lieu thereof the date "April 3,
                  2003."

         2. Conditions Precedent. The effectiveness of this Amendment is subject
to the satisfaction of the following conditions precedent (unless specifically
waived in writing by Lender):

         (a)      Borrowers shall have executed and delivered a copy of this
                  Amendment to Lender;

         (b)      Borrowers shall have paid to Lender a fee in respect of the
                  transactions contemplated hereunder in the amount of $125,000
                  (and by their execution hereof, Borrowers hereby authorize and
                  direct Lender to charge Borrowers' loan account for the full
                  amount of such fee);

         (c)      Borrowers shall have delivered to Lender copies of the
                  resolutions of the boards of directors of Borrowers with
                  respect to the transactions contemplated by this Amendment,
                  each certified as being true, complete and correct in all
                  respects by an officer of each Borrower;

         (d)      No Default or Event of Default shall have occurred and be
                  continuing;

         (e)      The warranties and representations of Borrowers contained in
                  this Amendment, the Loan Agreement, as amended hereby, and the
                  Loan Documents shall be true and correct in all material
                  respects as of the date hereof, with the same effect as though
                  made on such date.
<PAGE>

         3. Miscellaneous.

         (a)      Entire Agreement. This Amendment, including all schedules and
                  other documents attached hereto or incorporated by reference
                  herein, constitutes the entire agreement of the parties with
                  respect to the subject matter hereof and supercedes all other
                  understandings, oral or written, with respect to the subject
                  matter hereof.

         (b)      Captions. Section captions used in this Amendment are for
                  convenience only, and shall not affect the construction of
                  this Amendment.

         (c)      Costs and Expenses. As provided in Section 9.3 of the Loan
                  Agreement, Borrowers agree to pay on demand all reasonable
                  fees, costs and expenses incurred by Lender in connection with
                  the preparation, execution and delivery of this Amendment.

         (d)      Governing Law. This Amendment shall be a contract made under
                  and governed by the laws of the State of Illinois, without
                  regard to conflict of laws principles. Whenever possible each
                  provision of this Amendment shall be interpreted in such
                  manner as to be effective and valid under applicable law, but
                  if any provision of this Amendment shall be prohibited by or
                  invalid under such law, such provision shall be ineffective to
                  the extent of such prohibition or invalidity, without
                  invalidating the remainder of such provision or the remaining
                  provisions of this Amendment.

         (e)      Counterparts. This Amendment may be executed in any number of
                  counterparts and by the different parties on separate
                  counterparts, and each such counterpart shall be deemed to be
                  an original, but all such counterparts shall together
                  constitute but one and the same Amendment.

         (f)      Successors and Assigns. This Amendment shall be binding upon
                  and shall inure to the sole benefit of Borrowers and Lender
                  and their respective successors and assigns.

         (g)      References. Any reference to the Loan Agreement contained in
                  any notice, request, certificate, or other document executed
                  concurrently with or after the execution and delivery of this
                  Amendment shall be deemed to include this Amendment unless the
                  context shall otherwise require.

         (h)      Continued Effectiveness. Notwithstanding anything contained
                  herein, the terms of this Amendment are not intended to and do
                  not serve to effect a novation as to the Loan Agreement. The
                  parties hereto expressly do not intend to extinguish the Loan
                  Agreement. Instead, it is the express intention of the parties
                  hereto to reaffirm the indebtedness created under the Loan
                  Agreement which is evidenced by the Notes and secured by the
                  Collateral. The Loan Agreement as amended hereby and each of
                  the Loan Documents remain in full force and effect.

<PAGE>

         IN WITNESS WHEREOF, this Amendment has been duly executed as of the day
and year first above written.

                                                GUARDIAN INTERNATIONAL, INC.

                                                By:         /s/ DARIUS G. NEVIN
                                                         ----------------------
                                                           Darius G. Nevin
                                                Title:  Vice President

                                                MUTUAL CENTRAL ALARM SERVICES

                                                By:         /s/ DARIUS G. NEVIN
                                                         ----------------------
                                                           Darius G. Nevin
                                                Title:  Vice President

                                                HELLER FINANCIAL, INC.

                                                By:         /s/ SCOTT GAST
                                                         ----------------------
                                                             Scott Gast
                                                Title:  Vice PresidentEXHIBIT - 10.13

      New Agreement dated July 30, 2001 re: Consultancy arrangements with Robert
      Petty and option to acquire an equity interest in ROO Media Corporation,
      Inc, an affiliate of Mr. Petty.

              July 30, 2001

              Mr. Robert Petty
              Petty Consulting, Inc.

                  Re:      I.T. Technology, Inc. (the "Company") -
                           Agreements with Robert Petty & certain of His
                           Affiliates

              Dear Mr. Petty:

                           Reference is made to the Consulting Agreement between
              the Company and Petty Consulting, Inc. ("Consultant") dated
              January 17, 2000, as amended by an amendment thereto dated
              November 14, 2001 (collectively, the "Petty Consulting
              Agreement"). The Petty Consulting Agreement terminated in
              accordance with its terms on January 17, 2001 (the "Termination
              Date"); however, the parties acknowledge and agree that Consultant
              continued to render services to the Company after the Termination
              Date pursuant to an unwritten understanding which was terminable
              by either party at any time (the "At Will Consultancy"). At this
              time, the Company and Consultant desire to both restructure and
              formalize the consultancy arrangement on a prospective basis.
              Consequently, the parties hereto have agreed as follows:

                           1. Effective as of the date hereof, the At Will
              Consultancy and all other arrangements or agreements between
              Consultant, the Company and/or any affiliated entities therewith
              (the "Other Agreements"), including VideoDome.com Networks, Inc.
              ("VideoDome"), shall terminate and be of no further force and
              effect. In that regard, Consultant acknowledges that it has
              received all fees, expenses and other consideration due it with
              respect to the At Will Consultancy and the Other Arrangements,
              with the sole exception of a balance of $8,000, due and
              outstanding from VideoDome for past services, which shall be paid
              at a mutually agreeable future date to be determined by VideoDome
              and Consultant.

                           2. Notwithstanding the termination of the At Will
              Consultancy, effective as of the date hereof, Consultant agrees to
              cause Robert Petty to continue to render such consultancy services
              to the Company and VideoDome or any of their affiliated entities,
              as they may in their sole discretion request from Consultant
              ("Additional Consultancy Services") for a period of up to one year
              from the date hereof or such longer period as the Consultant and
              the Company may agree to (the "Renewed Consultancy Period");
              provided, however, the Company may elect to terminate the
              Additional Consultancy Services at any time by notice to
              Consultant.

                           3. As full compensation for the Additional
              Consultancy Services, Consultant agrees to receive only the
              following as compensation: the Company's grant to the Consultant's
              designee, Robert Petty ("Petty"), of options to purchase Seven
              Hundred and Fifty Thousand (750,000) fully-vested shares of the
              Company's common stock at a purchase price of Ten Cents ($.10) per
              share. Said options shall expire two (2) years from the date of
              hereof and shall contain such other terms and conditions as set
              forth in that certain Stock Option Agreement between Petty and the
              Company dated as of the date hereof (the "Consultant Option
              Agreement"). In connection with the foregoing, Petty agrees that
              the Option Agreement between Petty and the Company entered into as
              of October 20, 2000 shall terminate effective as of the date
              hereof and shall no longer be of any force or effect.

<page>

                           4. Notwithstanding anything to the contrary contained
              herein, the Company hereby acknowledges and agrees that Consultant
              and Petty shall be entitled to resell VideoDome products and
              services through an affiliated entity, ROO Media Corporation, a
              Delaware corporation ("ROO"), subject to the negotiation and
              execution of a mutually acceptable agreement between VideoDome and
              ROO (ROO VideoDome Agreement"). The Company and Bickhams will, if
              their circumstances warrant, agree to make available to ROO an
              agreed upon amount of office space and secretarial support at
              their costs or such other terms as agreed upon by the parties from
              time to time.

                           5. In addition, for the consideration set forth
              below, the Company hereby grants to ROO or its nominee, options to
              purchase an additional Five Hundred Thousand (500,000) shares of
              the Company's common stock (the "ROO Options") at an exercise
              price of Ten Cents ($.10) per share. The ROO Options shall: (i)
              have a term which expires upon the first to occur of: (a) two
              years from the vesting date thereof or (b) three years from the
              date hereof; (ii) the ROO Options shall vest and become
              exercisable as follows: (a) options to purchase Two Hundred and
              Fifty Thousand (250,000) shares shall vest and become exercisable
              on the date hereof and (b) options to to purchase an additional
              Two Hundred and Fifty Thousand (250,000) shares shall vest and
              become exercisable upon the exercise of the "Bickhams Option, "
              described below and if the Bickhams option terminates without
              being exercised, the options to purchase these additional 250,000
              shares shall automatically terminate; and.(iii) contain such other
              terms and conditions as set forth in that certain Stock Option
              Agreement between ROO and the Company dated as of the date hereof
              (the "ROO Option Agreement"). In consideration for the grant of
              the ROO Option, ROO hereby grants to the Company's affiliate,
              Bickhams Media, Inc.("Bickhams") a one year option to acquire an
              equity interest equivalent to Twenty Five percent (25%) of ROO's
              or its successor entity's existing equity on a fully-diluted basis
              as of the date of this Agreement (the "Bickhams Option") for no
              additional payment or other consideration. ROO further agrees
              that: (a) either for a period of 12 months from the date hereof or
              (b) whilst the Bickhams Option remains unexercised, it shall not
              issue any shares, options or other instruments that will cause a
              dilution to Bickham's potential equity interest of Twenty Five
              percent (25%) of ROO's or its successor entity's equity, without
              the prior approval of Bickhams, which shall not be unreasonably
              withheld. Until Bickhams elects to formally exercise the Bickhams
              Option, which may be accomplished solely by the delivery of
              written notice thereof to ROO, Bickhams shall not be deemed to own
              any of the outstanding equity of ROO.

              Nothing contained herein, nor the exercise of the Bickhams Option
              shall obligate Bickhams, the Company or any of their respective
              affiliates to provide any funding or shall be deemed to infer any
              operational or managerial supervision, oversight or control of ROO
              by Bickhams, the Company or any of their respective affiliates. In
              addition, ROO and Petty agree that upon the exercise of the
              Bickhams Option, Bickham's ownership of any equity interest in ROO
              shall be maintained as a free-carried interest, with no
              contributions required. In connection with the foregoing, ROO and
              Petty agree to indemnify and hold harmless Bickhams, the Company
              or any of their respective affiliates against any claims, losses,
              liabilities, damages and judgments arising out of or relating to
              the Bickhams Option or Bickham's ownership of any equity in ROO,
              if applicable.

                           6. ROO, Consultant and Petty, on their own behalf and
              on behalf of their respective affiliates (collectively, "Petty
              Affiliate") further covenant and agree that until twelve (12)
              months after the last to occur of: (i) the expiration of the
              Renewed Consultancy Period; (ii) the expiration of the ROO Option
              or (iii) the expiration of the of the Roo VideoDome Agreement, if
              executed, not to compete in any way with the business or prospects
              of the Company, VideoDome or any of their respective affiliates.
              For the purposes hereof such "competition" shall include, but is
              not limited to, the solicitation of orders, business,
              opportunities or capital from any entity which was initially
              introduced to any Petty Affiliate by the Company, VideoDome or any
              of their respective subsidiaries or affiliates.

<page>

                           7. ROO, Consultant and Petty on their own behalf and
              on behalf of the Petty Affiliates, further covenant and agree that
              Sections 7(b) and 7(c), 11 and 12(a)-(m) and 12(o)-(q) of the
              Petty Consultancy Agreement, shall remain in full force and effect
              and agree to be bound by the terms thereof. Except for the
              aforementioned sections, the Petty Consultancy Agreement shall
              hereby be terminated, null and void.

                           8. This Agreement, the ROO Options, the Consultant
              Options and the Bickhams Options constitutes the complete
              understanding of the parties with respect to the subject
              matter hereof and supercedes all other arrangements,
              understandings and agreements between the parties.

                           If the foregoing accurately summarizes your
              understanding, please indicate so by dating and executing a copy
              of this letter where indicated below and returning a copy to the
              undersigned.

                                                Very truly yours,

                                                I.T. TECHNOLOGY, INC.

                                                By: /s/ Levi Mochkin
                                                      Levi Mochkin
                                                Its:  Chief Executive Officer

              PETTY CONSULTING, INC.

              By: /s/ Robert Petty
                  ----------------
                      Robert Petty
              Its:    President

                  /s/ Robert Petty
                  ----------------
                  Robert Petty, an individual

              ROO Media Corporation, Inc.

              By: /s/ Robert Petty
                  ----------------
                      Robert Petty
              Its:    President

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