adjust paypal ipn file in cre loaded

I need someone to help me out with a issue in my paypal ipn file. right now i have a cre loaded system that is modified to handle subscriptions and single purchase products. i am adding a subscription product that also has 7 days free to start then is charged. i need to modify parts of my paypal ipn file to handle this. for each signup and subscription payment the following happens. 1. update orders table marked as paid 2. update membership field in customer field 3. send info over to post affiliate pro 4. update royalties table. i need to change these to do the following. 2. update membership field from 32 days to 32 days or 7 days if it is a trial product 4. update royalties table from 4.50 to 15% of total after fees this isnt that trivial to someone that knows paypal very well. i can work with you to do this. i need a little guidance more then i need someone to just go in and do it. i bet this will take us less then 1 hour to do in all. msg me in pmb any questions. payment in full via escrow. i need someone asap so i can get this finished up.