Hmm, well there are a few different ways to go about this Todd. For all of my products, whether Re-Sale rights, ones I've purchased rebranding rights to or PLR's, I now use a system called RAP. It's a complete product, affiliate, and payment system. But, I didn't always do things that way.
You can set up your product through Paypal itself. Without any of the system I just mentioned. First of all, I know Liz Tomey has a free site which teaches you by video how to set up Paypal for your product. It will explain it by video much faster than I will be able to explain it here. It's here, there are videos inside to help you.
Resell Rights For NewbiesIt's been a long, long time since I've been in there, but I just checked it out and the site is still active.
I hope that helps. If you are going to be doing this with a lot of products in the future. I'd suggest you get a system for yourself like RAP. It helps a lot, in keeping track of everything. Very well worth it.
If you want to look at that, it's on a peel ad in the right hand corner at my blog.
http://www.luvcomputers.com/blog/Hope that helps you..
Cheers
Davin