Add product to my osCommerce cart

I need someone who knows osCommerce and can add a product to my site. Currently, when you purchase my software, you are taken to the download page and there are three downloads. I want to change this to only one download. It will be a .txt file with a download key. That is all they will need after purchase. My current product is at: [login to view URL] I would like to leave this in tact until I’m sure the new product page is working and I won’t need to revert back to the old one. The new product page will be accessible from here: [login to view URL] I will also need to change some text in places to go along with the new product. I need this ASAP. Thanks, Dana