Affiliate Payouts

Hi,

I am trying to figure out how to set up payments for affiliates. From other posts in the forum, I got how to set up the payouts rats as following:

Pro Sites - Set it as a fixed payment.

MarketPress - Percentage - This is a new addon and can't yet be defined for individual products, it's store wide.

Directory - Set it as a fixed payment.

Membership - Set it as a fixed payment.

The only plugin I have is affiliates. Is it possible for me to set a fixed payment without buying a new plug in? Thanks!