Document:

<PAGE>

                                                Executed in 6 Parts
                                              Counterpart No. (   )

                     NATIONAL EQUITY TRUST

                    BIOTECH SECURITIES TRUST

                   REFERENCE TRUST AGREEMENT

       This Reference Trust Agreement dated March 15, 2000 among
Prudential Securities Incorporated, as Depositor and The Bank of New
York, as Trustee, sets forth certain provisions in full and incorpo-
rates other provisions by reference to the document entitled "National
Equity Trust, Trust Indenture and Agreement" (the "Basic Agreement")
dated February 2, 2000.  Such provisions as are set forth in full
herein and such provisions as are incorporated by reference constitute
a single instrument (the "Indenture").

                        WITNESSETH THAT:

       In consideration of the premises and of the mutual agree-
ments herein contained, the Depositor and the Trustee agree as fol-
lows:

                            Part I.

             STANDARD TERMS AND CONDITIONS OF TRUST

       Subject to the provisions of Part II hereof, all the provi-
sions contained in the Basic Agreement are herein incorporated by ref-
erence in their entirety and shall be deemed to be a part of this in-
strument as fully and to the same extent as though said provisions had
been set forth in full in this instrument.

<PAGE>
                              -2-

                            Part II.

             SPECIAL TERMS AND CONDITIONS OF TRUST

       The following special terms and conditions are hereby agreed
to:

       A.   The Trust is denominated National Equity Trust, Biotech
  Securities Trust.

       B.   The Units of the Trust shall be subject to a deferred
  sales charge.

       C.   The publicly traded stocks listed in Schedule A hereto
  are those which, subject to the terms of this Indenture, have
  been or are to be deposited in Trust under this Indenture as of
  the date hereof.

       D.   The term "Depositor" shall mean Prudential Securities
  Incorporated.

       E.   The aggregate number of Units referred to in Sec-
  tions 2.03 and 9.01 of the Basic Agreement is 250,000 as of the
  date hereof.

       F.   A Unit of the Trust is hereby declared initially equal
  to 1/250,000 th of the Trust.

       G.   The term "First Settlement Date" shall mean
  March 21, 2000.

       H.   The terms "Computation Day" and "Record Date" shall be
  on such dates as the Sponsor shall direct.

       I.   The term "Distribution Date" shall be on such dates as
  the Sponsor shall direct.

       J.   The term "Termination Date" shall mean March 20, 2002.

       K.   The Trustee's Annual Fee shall be $.90 (per 1,000
  Units) for 49,999,999 and below units outstanding $.84 (per
  1,000 Units) on the next 50,000,000 Units, $.78 (per 1,000
  Units) on the next 100,000,000 Units and $.66 (per 1,000 Units)
  on Units in excess of 200,000,000 Units.  In calculating the
  Trustee's annual fee, the fee applicable to the number of units
  outstanding shall apply to all units outstanding.

<PAGE>
                              -3-

       L.   The Depositor's Portfolio supervisory service fee shall
          be $.25 per 1,000 Units.

       [Signatures and acknowledgments on separate pages]

<PAGE>

                              -4-

       The Schedule of Portfolio Securities in Part A of the pro-
       spectus included in this Registration Statement for National
       Equity Trust, Biotech Securities Trust is hereby incorpo-
       rated by reference herein as Schedule A hereto.<PAGE>

                                                Executed in 6 Parts
                                              Counterpart No. (   )

                     NATIONAL EQUITY TRUST

                   OTC GROWTH TRUST SERIES 6

                   REFERENCE TRUST AGREEMENT

       This Reference Trust Agreement dated March 15, 2000 among
Prudential Securities Incorporated, as Depositor and The Bank of New
York, as Trustee, sets forth certain provisions in full and incorpo-
rates other provisions by reference to the document entitled "National
Equity Trust, Trust Indenture and Agreement" (the "Basic Agreement")
dated February 2, 2000.  Such provisions as are set forth in full
herein and such provisions as are incorporated by reference constitute
a single instrument (the "Indenture").

                        WITNESSETH THAT:

       In consideration of the premises and of the mutual agree-
ments herein contained, the Depositor and the Trustee agree as fol-
lows:

                            Part I.

             STANDARD TERMS AND CONDITIONS OF TRUST

       Subject to the provisions of Part II hereof, all the provi-
sions contained in the Basic Agreement are herein incorporated by ref-
erence in their entirety and shall be deemed to be a part of this in-
strument as fully and to the same extent as though said provisions had
been set forth in full in this instrument.

<PAGE>

                              -2-

                            Part II.

             SPECIAL TERMS AND CONDITIONS OF TRUST

       The following special terms and conditions are hereby agreed
to:

       A.   The Trust is denominated National Equity Trust, OTC
  Growth Trust Series 6.

       B.   The Units of the Trust shall be subject to a deferred
  sales charge.

       C.   The publicly traded stocks listed in Schedule A hereto
  are those which, subject to the terms of this Indenture, have
  been or are to be deposited in Trust under this Indenture as of
  the date hereof.

       D.   The term "Depositor" shall mean Prudential Securities
  Incorporated.

       E.   The aggregate number of Units referred to in Sec-
  tions 2.03 and 9.01 of the Basic Agreement is 250,000 as of the
  date hereof.

       F.   A Unit of the Trust is hereby declared initially equal
  to 1/250,000th of the Trust.

       G.   The term "First Settlement Date" shall mean
  March 21, 2000.

       H.   The terms "Computation Day" and "Record Date" shall be
  on such dates as the Sponsor shall direct.

       I.   The term "Distribution Date" shall be on such dates as
  the Sponsor shall direct.

       J.   The term "Termination Date" shall mean April 19, 2001.

       K.   The Trustee's Annual Fee shall be $.90 (per 1,000
  Units) for 49,999,999 and below units outstanding $.84 (per 1,000
  Units) on the next 50,000,000 Units, $.78 (per 1,000 Units) on
  the next 100,000,000 Units, and $.66 (per 1,000 Units) on Units
  in excess of 200,000,000 Units.  In calculating the Trustee's an-
  nual fee, the fee applicable to the number of units outstanding
  shall apply to all units outstanding.

<PAGE>

                              -3-

       L.   The Depositor's Portfolio supervisory service fee shall
  be $.25 per 1,000 Units.

       [Signatures and acknowledgments on separate pages]

<PAGE>

                              -4-

       The Schedule of Portfolio Securities in Part A of the pro-
       spectus included in this Registration Statement for National
       Equity Trust, OTC Growth Trust Series 6 is hereby incorpo-
       rated by reference herein as Schedule A hereto.<PAGE>

                       AMENDMENT TO EMPLOYMENT AGREEMENT

The following is an Amendment to the Employment Agreement by between
Acquireu.com, Inc., (the Company) and Douglas E. Greer (the Executive) dated May
27, 1999. This Amendment is entered into and effective on December 15, 1999,
("Effective Date")

The following Amends Section 3 "Compensation" of the Employment Agreement
entered into on May 27, 1999 by and between the Company and the Executive to
read the following,
As compensation for his services hereunder, (a) the Company shall pay the
Executive during the Employment period a salary at a rate of Twelve Thousand
Five Hundred dollars ($12,500) (hereafter the "base Salary") per annum.
Executive's Salary shall accrue and be payable upon the completion of the
Company's Initial Public Offering and shall be paid in full at such time,
notwithstanding whether the one year initial term has been reached.

IN WITNESS WHEREOF, the parties hereto have executed and delivered this
Agreement as of the day and year first above written.

By:  /s/  Douglas E. Greer
   ----------------------------------
Board of Directors, Acquireu.com, Inc.
Douglas E. Greer, Director (s)

By:  /s/  Douglas E. Greer
   -----------------------------------
Douglas Greer
Executive<PAGE>

        COMMON STOCK                                         COMMON STOCK

       NUMBER                Greenfield Online(TM)(Logo)              SHARES

       GO
                             GREENFIELD ONLINE, INC.         CUSIP
                       INCORPORATED UNDER THE LAWS OF THE    SEE REVERSE FOR
                               STATE OF DELAWARE             CERTAIN DEFINITIONS

THIS CERTIFIES THAT:

IS THE OWNER OF

          FULLY PAID AND NON-ASSESSABLE SHARES OF THE COMMON STOCK PAR
                           VALUE $0.001 PER SHARE OF

GREENFIELD ONLINE, INC. (hereinafter called the Corporation), transferable on
the books of the Corporation by the holder hereof in person or by duly
authorized attorney, upon surrender of this Certificate properly endorsed. This
Certificate and the shares represented hereby are issued and shall be held
subject to all of the provisions of the Certificate of Incorporation and Bylaws
of the Corporation and of the amendments from time to time made thereto (copies
of which are on file with the Transfer Agent) and to legends, if any, appearing
on the reverse hereof or appended hereto, to all of which the holder, by
acceptance hereof, assents.

      This Certificate is not valid until countersigned by the Transfer Agent
      and registered by the Registrar.
      Witness the facsimile seal of the Corporation and the facsimile signatures
      of its duly authorized officers.

      Dated:

     SIGNATURE TO COME                                     SIGNATURE TO COME
                                  SEAL TO COME

     CHIEF EXECUTIVE OFFICER                                   SECRETARY

                                COUNTERSIGNED AND REGISTERED:
                                ChaseMellon Shareholder Services, L.L.C.
                                                                TRANSFER AGENT
                                                                 AND REGISTRAR

                                        BY
                                                          AUTHORIZED SIGNATURE

<PAGE>

                           GREENFIELD ONLINE, INC.

LEGEND:

      THE CORPORATION WILL FURNISH WITHOUT CHARGE TO EACH STOCKHOLDER WHO SO
REQUESTS A STATEMENT OF THE POWERS, DESIGNATIONS, PREFERENCES, AND RELATIVE,
PARTICIPATING, OPTIONAL OR OTHER SPECIAL RIGHTS OF EACH CLASS OF STOCK OR SERIES
THEREOF OF THE CORPORATION AND THE QUALIFICATIONS, LIMITATIONS OR RESTRICTIONS
OF SUCH PREFERENCES AND/OR RIGHTS. SUCH REQUEST MAY BE MADE TO THE SECRETARY OF
THE CORPORATION.

      The following abbreviations, when used in the inscription on the face of
this Certificate, shall be construed as though they were written out in full
according to applicable laws or regulations:

TEN COM  -- as tenants in common          UNIF GIFT MIN ACT--___ Custodian ___
TEN ENT  -- as tenants by the entireties                    (Cust)       (Minor)
JT TEN   -- as joint tenants with right of         Under Uniform Gifts to Minors
            survivorship and not as                Act__________________________
            tenants in common                                 (state)

     Additional abbreviations may also be used though not in the above list.

For Value Received,                                          hereby sell,
                    ----------------------------------------
assign and transfer unto

PLEASE INSERT SOCIAL SECURITY OR
OTHER IDENTIFYING NUMBER
OF ASSIGNEE

--------------------------------------------------------------------------------

--------------------------------------------------------------------------------
(PLEASE PRINT OR TYPEWRITE NAME AND ADDRESS, INCLUDING ZIP CODE, OF ASSIGNEE)

--------------------------------------------------------------------------------

------------------------------------------------------------------------- Shares
represented by the within Certificate, and do hereby irrevocably constitute
and appoint

----------------------------------------------------------------------- Attorney
to transfer the said shares on the books of the within-named Corporation with
full power of substitution in the premises.

Dated
     -------------

                                    --------------------------------------------
                        NOTICE:     THE SIGNATURE(S) TO THE ASSIGNMENT MUST
                                    CORRESPOND WITH THE NAME(S) AS WRITTEN UPON
                                    THE FACE OF THE CERTIFICATE IN EVERY
                                    PARTICULAR, WITHOUT ALTERATION OR
                                    ENLARGEMENT OR ANY CHANGE WHATEVER.

SIGNATURE GUARANTEED:

-------------------------------------------------------------
THE SIGNATURE(S) SHOULD BE GUARANTEED BY AN ELIGIBLE
GUARANTOR INSTITUTION (BANKS, STOCKBROKERS, SAVINGS AND LOAN
ASSOCIATIONS AND CREDIT UNIONS WITH MEMBERSHIP IN AN APPROVED
SIGNATURE GUARANTEE, MEDALLION PROGRAM), PURSUANT TO S.E.C.
RULE 17Ad-15.

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