FIx / Recode 6 IPN paypal files. (SIMPLE FILES)

I have 6 Files that I need fixed. 1 is for subscriptions (renew every 10-30 days) I need it to update the users accounts when hit, as well as when it renews. the other 5 files update based on single purchases. Buttons are supplied as to how the payments are sent in and have <?php //admin notes showing what buttons belong to what ipn files. Also supplied is the database structure tables. You will ahve to insert a entry to the users table for updating to I will need any button changes, or ipn changes made, code cleaned up, secure and fully working. Job should be fairly cheap as there is not much to do. all the code is there. just needs to be fully tested, and reworked a slight bit. Please mention NOT A BOT in your bid remarks to rule out auto bidding. Files attached. Thanks