Affiliate tracking for MarketPress

Hello,

I am looking for solution that will allow me to track affiliate referrals to a marketpress shop.

What I have in mind is to create a websites for affiliates at affiliate_1.domain.com, affiliate_2.domain.com, affiliate_3.domain.com etc have their menu item "SHOP" link / redirect to the domain.com/shop where customers will place orders.

I'd need a solution to track and reward the affiliates sending buyers.

I've looked at http://www.qualityunit.com/postaffiliatepro/ and http://www.affiliateshop.com/ .

In the end, what I'd like to have is a two tier affiliate program meaning:

1) Affiliates get commissions for creating more affiliates (using the WPMUDEV affiliate plug-in) and

2) an affiliate solution to track and reward sales of product at domain.com/shop

I'm very grateful for any suggestions.

regards