<PAGE>

                                                                     Exhibit 4.1
Advisory and Consulting Agreement


                     Number of Shares
                     ----------------

     4.1(a)              500,000

     4.1(b)              750,000

     4.1(c)              100,000

     Other                26,000

<PAGE>

                                                                  Exhibit 4.1(a)

                             CONSULTING AGREEMENT

     This Consulting Agreement (the "Consulting Agreement") made as of December
28, 1999, by and between M. Blaine Riley, III, 33966 Crystal Lantern, Dana
Point, CA 92629 ("Consultant") and Imaging Technologies Corporation with offices
at 15175 Innovation Drive, CA 92128 (the "Company").

                                  WITNESSETH

     WHEREAS, the Company requires and will continue to require consulting
services relating management, strategic planning and marketing in connection
with its business; and

     WHEREAS, Consultant can provide the Company with strategic planning and
marketing consulting services and is desirous of performing such services for
the Company; and

     WHEREAS, the Company wishes to induce Consultant to provide these
consulting services to the Company,

     NOW, THEREFORE, in consideration of the mutual covenants hereinafter
stated, it is agreed as follows:

     1.   APPOINTMENT.
          -----------

     The Company hereby engages Consultant and Consultant agrees to render
services to the Company as a consultant upon the terms and conditions
hereinafter set forth.

     2.   TERM.
          ----

     The term of this Consulting Agreement began as of the date of this
Agreement, and shall terminate on December 29, 2000, unless earlier terminated
in accordance with paragraph 8 herein or extended as agreed to between the
parties.

     3.   SERVICES.
          --------

     During the term of this Agreement, Consultant shall provide advice to
undertake for and consult with the Company concerning management, marketing,
consulting, strategic planning, corporate organization and structure, financial
matters in connection with the operation of the businesses of the Company,
expansion of services, acquisitions and business opportunities, and shall review
and advise the Company regarding its overall progress, needs and condition.
Consultant agrees to provide on a timely basis the following enumerated services
plus any additional services contemplated thereby:

          (a)  The implementation of short-range and long-term strategic
          planning to fully develop and enhance the Company's assets, resources,
          products and services;

          (b)  The implementation of a marketing program to enable the Company
          to broaden the markets for its services and promote the image of the
          Company and its products and services;

          (c)  Advise the Company relative to the recruitment and employment of
          key executives consistent with the expansion of operations of the
          Company;

<PAGE>

          (d)  The identification, evaluation, structuring, negotiating and
          closing of joint ventures, strategic alliances, business acquisitions
          and advice with regard to the ongoing managing and operating of such
          acquisitions upon consummation thereof; and

          (e)  Advice and recommendations regarding corporate financing
          including the structure, terms and content of bank loans,
          institutional loans, private debt funding, mezzanine financing, blind
          pool financing and other preferred and common stock equity private or
          public financing.

     4.   DUTIES OF THE COMPANY.
          ---------------------

     The Company shall provide Consultant, on a regular and timely basis, with
all approved data and information about it, its subsidiaries, its management,
its products and services and its operations as shall be reasonably requested by
Consultant, and shall advise Consultant of any facts which would affect the
accuracy of any data and information previously supplied pursuant to this
paragraph. The Company shall promptly supply Consultant with full and complete
copies of all financial reports, all fillings with all federal and state
securities agencies; with full and complete copies of all stockholder reports;
with all data and information supplied by any financial analyst, and with all
brochures or other sales materials relating to its products or services.

     5.   COMPENSATION.
          ------------

     The Company will immediately grant Consultant the option to purchase
500,000 shares of the Company's Common Stock valued at $.0.50 per share, which
option shall expire on December 29, 2000 at 5:00 P.M. P.S.T. Consultant in
providing the foregoing services, shall not be responsible for any out-of-pocket
costs, including, without limitation, travel, lodging, telephone, postage and
Federal Express charges.

     6.   REPRESENTATION AND INDEMNIFICATION.
          ----------------------------------

     The Company shall be deemed to have been made a continuing representation
of the accuracy of any and all facts, material information and data which it
supplies to Consultant and acknowledges its awareness that Consultant will rely
on such continuing representation in disseminating such information and
otherwise performing its advisory functions. Consultant in the absence of notice
in writing from the Company, will rely on the continuing accuracy of material,
information and data supplied by the Company. Consultant represents that he has
knowledge of and is experienced in providing the aforementioned services.

     7.   MISCELLANEOUS.
          -------------

     Termination:   This Agreement may be terminated by either Party upon
     -----------
written notice to the other Party for any reason which shall be effective five
(5) business days from the date of such notice. This Agreement shall be
terminated immediately upon written notice for material breach of this
Agreement.

     Modification:  This Consulting Agreement sets forth the entire
     ------------
understanding of the Parties with respect to the subject matter hereof. This
Consulting Agreement may be amended only in writing signed by both Parties.

     Notices:  Any notice required or permitted to be given hereunder shall be
     -------
in writing and shall be mailed or otherwise delivered in person or by facsimile
transmission at the address of such Party set forth above or to such other
address or facsimile telephone number as the Party shall have furnished in
writing to the other Party.

<PAGE>

     Waiver:  Any waiver by either Party of a breach of any provision of this
     ------
Consulting Agreement shall not operate as or be construed to be a waiver of any
other breach of that provision or of any breach of any other provision of this
Consulting Agreement. The failure of a Party to insist upon strict adherence to
any term of this Consulting Agreement on one or more occasions will not be
considered a waiver or deprive that Party of the right thereafter to insist upon
adherence to that term of any other term of this Consulting Agreement.

     Assignment:    The Options under this Agreement are assignable at the
     ----------
discretion of the Consultant.

     Severability:  If any provision of this Consulting Agreement is invalid,
     ------------
illegal, or unenforceable, the balance of this Consulting Agreement shall remain
in effect, and if any provision is inapplicable to any person or circumstance,
it shall nevertheless remain applicable to all other persons and circumstances.

     Disagreements: Any dispute or other disagreement arising from or out of
     -------------
this Consulting Agreement shall be submitted to arbitration under the rules of
the American Arbitration Association and the decision of the arbiter(s) shall be
enforceable in any court having jurisdiction thereof. Arbitration shall occur
only in San Diego, CA. The interpretation and the enforcement of this Agreement
shall be governed by California Law as applied to residents of the State of
California relating to contracts executed in and to be performed solely within
the State of California. In the event any dispute is arbitrated, the prevailing
Party (as determined by the arbiter(s)) shall be entitled to recover that
Party's reasonable attorney's fees incurred (as determined by the arbiter(s)).

     IN WITNESS WHEREOF, this Consulting Agreement has been executed by the
Parties as of the date first above written.

IMAGING TECHNOLOGY CORP.                  CONSULTANT



 /s/ Brian Bonar                          /s/ M. Blaine Riley, III
------------------------                  --------------------------
Brian Bonar                               M. Blaine Riley, III
President and CEO

<PAGE>

                                                                  Exhibit 4.1(b)

                             CONSULTING AGREEMENT

     This Consulting Agreement (the "Consulting Agreement") made as of December
28, 1999, by and between Richard Kaplan, P.O. Box 43272, Harnof Jerusalem,
Israel ("Consultant") and Imaging Technology Corporation with offices at 15175
Innovation Drive, San Diego, CA 92128 (the "Company").

                                  WITNESSETH

     WHEREAS, the Company is engaged in the business of printer technology and
wishes to expand its business by acquiring other companies; and

     WHEREAS, the Company requires and will continue to require consulting
services relating management, strategic planning and marketing in connection
with its business; and

     WHEREAS, Consultant can provide the Company with strategic planning and
marketing consulting services and is desirous of performing such services for
the Company; and

     WHEREAS, the Company wishes to induce Consultant to provide these
consulting services to the Company,

     NOW, THEREFORE,  in consideration of the mutual covenants hereinafter
stated, it is agreed as follows:

     1.   APPOINTMENT.
          -----------

     The Company hereby engages Consultant and Consultant agrees to render
services to the Company as a consultant upon the terms and conditions
hereinafter set forth.

     2.   TERM.
          ----

     The term of this Consulting Agreement began as of the date of this
Agreement, and shall terminate on December 29, 2000, unless earlier terminated
in accordance with paragraph 8 herein or extended as agreed to between the
parties.

     3.   SERVICES.
          --------

     During the term of this Agreement, Consultant shall provide advice to
undertake for and consult with the Company concerning management, marketing,
consulting, strategic planning, corporate organization and structure, financial
matters in connection with the operation of the businesses of the Company,
expansion of services, acquisitions and business opportunities, and shall review
and advise the Company regarding its overall progress, needs and condition.
Consultant agrees to provide on a timely basis the following enumerated services
plus any additional services contemplated thereby:

          (a)  The implementation of short-range and long-term strategic
          planning to fully develop and enhance the Company's assets, resources,
          products and services;

          (b)  The implementation of a marketing program to enable the Company
          to broaden the markets for its services and promote the image of the
          Company and its products and services;

<PAGE>

          (c)  Advise the Company relative to the recruitment and employment of
          key executives consistent with the expansion of operations of the
          Company;

          (d)  The identification, evaluation, structuring, negotiating and
          closing of joint ventures, strategic alliances, business acquisitions
          and advice with regard to the ongoing managing and operating of such
          acquisitions upon consummation thereof; and

          (e)  Advice and recommendations regarding corporate financing
          including the structure, terms and content of bank loans,
          institutional loans, private debt funding, mezzanine financing, blind
          pool financing and other preferred and common stock equity private or
          public financing.

     4.   DUTIES OF THE COMPANY.
          ---------------------

     The Company shall provide Consultant, on a regular and timely basis, with
all approved data and information about it, its subsidiaries, its management,
its products and services and its operations as shall be reasonably requested by
Consultant, and shall advise Consultant of any facts which would affect the
accuracy of any data and information previously supplied pursuant to this
paragraph. The Company shall promptly supply Consultant with full and complete
copies of all financial reports, all fillings with all federal and state
securities agencies; with full and complete copies of all stockholder reports;
with all data and information supplied by any financial analyst, and with all
brochures or other sales materials relating to its products or services.

          COMPENSATION.
          ------------

     The Company will immediately grant Consultant the option to purchase
750,000 shares of the Company's Common Stock valued at $.20 per share, which
options shall expire on December 29, 2000 at 5:00 P.M. P.S.T. Consultant in
providing the foregoing services, shall not be responsible for any out-of-pocket
costs, including, without limitation, travel, lodging, telephone, postage and
Federal Express charges.

     6.   REPRESENTATION AND INDEMNIFICATION.
          ----------------------------------

     The Company shall be deemed to have been made a continuing representation
of the accuracy of any and all facts, material information and data which it
supplies to Consultant and acknowledges its awareness that Consultant will rely
on such continuing representation in disseminating such information and
otherwise performing its advisory functions. Consultant in the absence of notice
in writing from the Company, will rely on the continuing accuracy of material,
information and data supplied by the Company. Consultant represents that he has
knowledge of and is experienced in providing the aforementioned services.

     7.   MISCELLANEOUS.
          -------------

     Termination:  This Agreement may be terminated by either Party upon written
     -----------
notice to the other Party for any reason which shall be effective five (5)
business days from the date of such notice. This Agreement shall be terminated
immediately upon written notice for material breach of this Agreement.

     Modification: This Consulting Agreement sets forth the entire
     ------------
understanding of the Parties with respect to the subject matter hereof. This
Consulting Agreement may be amended only in writing signed by both Parties.

     Notices:  Any notice required or permitted to be given hereunder shall be
     -------
in writing and shall be mailed or otherwise delivered in person or by facsimile
transmission at the address of such Party set forth above or to such other
address or facsimile telephone number as the Party shall have furnished in
writing to the other Party.

<PAGE>

     Waiver:   Any waiver by either Party of a breach of any provision of this
     ------
Consulting Agreement shall not operate as or be construed to be a waiver of any
other breach of that provision or of any breach of any other provision of this
Consulting Agreement. The failure of a Party to insist upon strict adherence to
any term of this Consulting Agreement on one or more occasions will not be
considered a waiver or deprive that Party of the right thereafter to insist upon
adherence to that term of any other term of this Consulting Agreement.

     Assignment:    The Options under this Agreement are assignable at the
     ----------
discretion of the Consultant.

     Severability:  If any provision of this Consulting Agreement is invalid,
     ------------
illegal, or unenforceable, the balance of this Consulting Agreement shall remain
in effect, and if any provision is inapplicable to any person or circumstance,
it shall nevertheless remain applicable to all other persons and circumstances.

     Disagreements: Any dispute or other disagreement arising from or out of
     -------------
this Consulting Agreement shall be submitted to arbitration under the rules of
the American Arbitration Association and the decision of the arbiter(s) shall be
enforceable in any court having jurisdiction thereof. Arbitration shall occur
only in San Diego, CA. The interpretation and the enforcement of this Agreement
shall be governed by California Law as applied to residents of the State of
California relating to contracts executed in and to be performed solely within
the State of California. In the event any dispute is arbitrated, the prevailing
Party (as determined by the arbiter(s)) shall be entitled to recover that
Party's reasonable attorney's fees incurred (as determined by the arbiter(s)).

     IN WITNESS WHEREOF, this Consulting Agreement has been executed by the
Parties as of the date first above written.

IMAGING TECHNOLOGY CORP.                            CONSULTANT



/s/ Brian Bonar                                     /s/ Richard Kaplan
----------------------------                        --------------------
Brian Bonar                                         Richard Kaplan
President and CEO

<PAGE>

                                                                  Exhibit 4.1(c)

                             CONSULTING AGREEMENT

     This Consulting Agreement (the "Consulting Agreement") made as of December
28, 1999 by and between Allenn Greene, 5850 West 3rd Street, Suite 279, Los
Angeles, CA 90036 ("Consultant") and Imaging Technology Corporation with offices
at 15175 Innovation Drive, San Diego, CA 92128 (the "Company").

                                  WITNESSETH

     WHEREAS, the Company is engaged in the business of printer technology and
wishes to expand its business by acquiring other companies; and

     WHEREAS, the Company requires and will continue to require consulting
services relating management, strategic planning and marketing in connection
with its business; and

     WHEREAS, Consultant can provide the Company with strategic planning and
marketing consulting services and is desirous of performing such services for
the Company; and

     WHEREAS, the Company wishes to induce Consultant to provide these
consulting services to the Company,

     NOW, THEREFORE,  in consideration of the mutual covenants hereinafter
stated, it is agreed as follows:

     1.   APPOINTMENT.
          -----------

     The Company hereby engages Consultant and Consultant agrees to render
services to the Company as a consultant upon the terms and conditions
hereinafter set forth.

     2.   TERM.
          ----

     The term of this Consulting Agreement began as of the date of this
Agreement, and shall terminate on December 29, 2000, unless earlier terminated
in accordance with paragraph 8 herein or extended as agreed to between the
parties.

     3.   SERVICES.
          --------

     During the term of this Agreement, Consultant shall provide advice to
undertake for and consult with the Company concerning management, marketing,
consulting, strategic planning, corporate organization and structure, financial
matters in connection with the operation of the businesses of the Company,
expansion of services, acquisitions and business opportunities, and shall review
and advise the Company regarding its overall progress, needs and condition.
Consultant agrees to provide on a timely basis the following enumerated services
plus any additional services contemplated thereby:

          (a)  The implementation of short-range and long-term strategic
          planning to fully develop and enhance the Company's assets, resources,
          products and services;

          (b)  The implementation of a marketing program to enable the Company
          to broaden the markets for its services and promote the image of the
          Company and its products and services;

<PAGE>

          (c)  Advise the Company relative to the recruitment and employment of
          key executives consistent with the expansion of operations of the
          Company;

          (d)  The identification, evaluation, structuring, negotiating and
          closing of joint ventures, strategic alliances, business acquisitions
          and advice with regard to the ongoing managing and operating of such
          acquisitions upon consummation thereof; and

          (e)  Advice and recommendations regarding corporate financing
          including the structure, terms and content of bank loans,
          institutional loans, private debt funding, mezzanine financing, blind
          pool financing and other preferred and common stock equity private or
          public financing.

     4.   DUTIES OF THE COMPANY.
          ---------------------

     The Company shall provide Consultant, on a regular and timely basis, with
all approved data and information about it, its subsidiaries, its management,
its products and services and its operations as shall be reasonably requested by
Consultant, and shall advise Consultant of any facts which would affect the
accuracy of any data and information previously supplied pursuant to this
paragraph. The Company shall promptly supply Consultant with full and complete
copies of all financial reports, all fillings with all federal and state
securities agencies; with full and complete copies of all stockholder reports;
with all data and information supplied by any financial analyst, and with all
brochures or other sales materials relating to its products or services.

          COMPENSATION.
          ------------

     The Company will immediately grant Consultant the option to purchase
100,000 shares of the Company's Common Stock valued at $.50 per share, which
options shall expire on December 29, 2000 at 5:00 P.M. P.S.T. Consultant in
providing the foregoing services, shall not be responsible for any out-of-pocket
costs, including, without limitation, travel, lodging, telephone, postage and
Federal Express charges.

     6.   REPRESENTATION AND INDEMNIFICATION.
          ----------------------------------

     The Company shall be deemed to have been made a continuing representation
of the accuracy of any and all facts, material information and data which it
supplies to Consultant and acknowledges its awareness that Consultant will rely
on such continuing representation in disseminating such information and
otherwise performing its advisory functions. Consultant in the absence of notice
in writing from the Company, will rely on the continuing accuracy of material,
information and data supplied by the Company. Consultant represents that he has
knowledge of and is experienced in providing the aforementioned services.

     7.   MISCELLANEOUS.
          -------------

     Termination:   This Agreement may be terminated by either Party upon
     -----------
written notice to the other Party for any reason which shall be effective five
(5) business days from the date of such notice. This Agreement shall be
terminated immediately upon written notice for material breach of this
Agreement.

     Modification:  This Consulting Agreement sets forth the entire
     ------------
understanding of the Parties with respect to the subject matter hereof. This
Consulting Agreement may be amended only in writing signed by both Parties.

     Notices:  Any notice required or permitted to be given hereunder shall be
     -------
in writing and shall be mailed or otherwise delivered in person or by facsimile
transmission at the address of such Party set forth
<PAGE>

above or to such other address or facsimile telephone number as the Party shall
have furnished in writing to the other Party.

     Waiver:  Any waiver by either Party of a breach of any provision of this
     ------
Consulting Agreement shall not operate as or be construed to be a waiver of any
other breach of that provision or of any breach of any other provision of this
Consulting Agreement. The failure of a Party to insist upon strict adherence to
any term of this Consulting Agreement on one or more occasions will not be
considered a waiver or deprive that Party of the right thereafter to insist upon
adherence to that term of any other term of this Consulting Agreement.

     Assignment:    The Options under this Agreement are assignable at the
     ----------
discretion of the Consultant.

     Severability:  If any provision of this Consulting Agreement is invalid,
     ------------
illegal, or unenforceable, the balance of this Consulting Agreement shall remain
in effect, and if any provision is inapplicable to any person or circumstance,
it shall nevertheless remain applicable to all other persons and circumstances.

     Disagreements: Any dispute or other disagreement arising from or out of
     -------------
this Consulting Agreement shall be submitted to arbitration under the rules of
the American Arbitration Association and the decision of the arbiter(s) shall be
enforceable in any court having jurisdiction thereof. Arbitration shall occur
only in San Diego, CA. The interpretation and the enforcement of this Agreement
shall be governed by California Law as applied to residents of the State of
California relating to contracts executed in and to be performed solely within
the State of California. In the event any dispute is arbitrated, the prevailing
Party (as determined by the arbiter(s)) shall be entitled to recover that
Party's reasonable attorney's fees incurred (as determined by the arbiter(s)).

     IN WITNESS WHEREOF, this Consulting Agreement has been executed by the
Parties as of the date first above written.

IMAGING TECHNOLOGY CORP.                                CONSULTANT



/s/ Brian Bonar                                         /s/ Allenn Greene
--------------------------                              -----------------
Brian Bonar                                             Allenn Greene
President and CEO