Membership integration and updates on Marketpress integration

I saw something on the membership integration plugin page saying to read the instructions for integrating the affiliate program, but I must be overlooking the because I don't see any. Should I upload the integration file in the membership or affiliate plugin folder?

Also, just wondering if there's an update on when it might be integrated with MarketPress. I'm selling a downloadable product and being able to set the affiliate program up just for that (instead of making people register as members) would be great.