install shopping cart with affiliate program and autoresponder

Hey Guys I need to sell a teleseminar, which is simply one product that does not require an extensive shopping cart, simply for clients to pay with a coupon and fill in the information on the next page and go to a think you page. I also need an affiliate program to be plugged into it and a proper mailing list on top of it. There is a shopping cart call [login to view URL] that does all that, but I find $50/month to be expensive. I was hoping we can accomplish all this with more costumizable opensource shopping cart such oscommerce to do the trick. For people who know and understand oscommerce this could be a half an hour job. Hope to get some interesting bids. I really would like to avoid the programming route, I really do preffer to stick to programs that are already there and can be costumized