169505 OsCommerce Modifications

we need to do some OsCommerce Modifications 1.) we have implemented Post affiliate pro script to oscommerce, but we process the sales manually, so we need something to be done that once sale is approved by the admin of oscommerce then affiliate gets credited. 2.) we need a add-on for oscommerce that will give a free Shipping for the purchase OVER 150$. Only experienced programmers required. Donot waste our time nor yours. We do not have much time for this to get completed. It should be done on urgent basis. Show us ur oscommerce work before you post anything to us. Thanks in advance!