**Exhibit
      4.2**








**AMENDMENT
      TO**


**UNIT
      PURCHASE OPTIONS**





This
      AMENDMENT TO UNIT PURCHASE OPTIONS (this ‘‘Amendment’’), dated October 4, 2006,
      is made by and between Millstream II Acquisition Corporation (the ‘‘Company’’)
      and the holders designated on the signature page hereof (‘‘Holders’’), to those
      certain Unit Purchase Options referred to below.





WHEREAS,
      the Company issued those certain Unit Purchase Options, dated December 23,
      2004
      (the ‘‘Unit Purchase Options’’), in connection with the Company’s initial public
      offering and the Holders are the owners of the Unit Purchase Options;
      and





WHEREAS,
      the parties hereto have agreed that the Unit Purchase Options be amended as
      set
      forth herein to clarify the understanding between the parties with respect
      to
      the terms of the Unit Purchase Options effective as of the date of their
      issuance.





NOW,
      THEREFORE, in consideration of the premises and of the agreements contained
      herein, the parties hereto hereby agree as follows:





1.    The
      Unit Purchase Options are hereby amended by adding the following new Section
      2.4
      to such Unit Purchase Options:





‘‘2.4 No
      Obligation to Net Cash Settle .    Notwithstanding
      anything to the contrary contained in this Purchase Option, if the Company
      is
      unable to deliver any securities pursuant to the exercise of this Purchase
      Option as a result of its inability to satisfy its registration requirements
      set
      forth in Section 5 hereof, the Company will have no obligation to pay such
      registered holder any cash or otherwise ‘‘net cash settle’’ the
      Warrant.’’





2.    Section
      5.3 of the Unit Purchase Options is hereby deleted in its entirety.





3.    Upon
      the due execution and delivery of this Amendment by the parties hereto, on
      and
      after the date hereof each reference in the Unit Purchase Options to this
‘‘Purchase Option’’, ‘‘hereunder’’, ‘‘hereof’’, ‘‘herein’’ or words of like
      import referring to the Unit Purchase Options shall mean and be a reference
      to
      the Unit Purchase Options, as amended hereby. Except as specifically amended
      above, the Unit Purchase Options shall remain in full force and effect and
      is
      hereby ratified and confirmed.





4.    This
      Amendment may be executed in one or more counterparts, and by the different
      parties hereto in separate counterparts, each of which shall be deemed to be
      an
      original, but all of which taken together shall constitute one and the same
      agreement, and shall become effective when one or more counterparts has been
      signed by each of the parties hereto and delivered to each of the other parties
      hereto.








IN
      WITNESS WHEREOF, the parties have executed this AMENDMENT TO UNIT PURCHASE
      OPTIONS as of the date first set forth above.




MILLSTREAM
                  II ACQUISITION CORPORATIONBy:/s/Arthur
                  SpectorName:
                  Arthur SpectorTitle:
                  Chief Executive OfficerHOLDERS:EARLYBIRDCAPTIAL,
                  INC.By:/s/
                  Steven LevineName:
                  Steven LevineTitle:
                  Chief Executive Officer/s/
                  David M. NussbaumDavid
                  M. Nussbaum/s/Steve
                  LevineSteve
                  Levine/s/
                  Pat SteoPat
                  Steo/s/Eileen
                  MooreEileen
                  Moore/s/
                  Robert GladstoneRobert
                  Gladstone/s/
                  Roger GladstoneRoger
                  Gladstone