Integrate Affiliate tracking image tags in OsCommerce shopping cart.

I need to have my affiliate tracking software integrated with my OsCommerce shopping cart. Although there is documentation for doing this located at [login to view URL] , there is a knowledge gap between me and their help manual. This is extremely important that I get it done ASAP!!! Please see the above link before bidding so that you can read the documentation. Once there, navigate to the "Integrating AssocTRAC with your Ordering System". I believe OsCommerce is a multi-stage shopping cart, so you can refer to that sub-tab. Please make sure you are familiar with OsCommerce before attempting this, as the multi-stage integration seems to be quite technical, although not a big workload at all. PLEASE GET BACK WITH ME ASAP, AS I WILL CHOOSE SOMEONE LONG BEFORE THE 1 DAY RUN OF THIS PROJECT HAS ENDED! Thank you. Sincerely, Paul