PayPal IPN subscription (small script project)

I have a website that offers free and paid memberships levels. The paid memberships are based on a PayPal subscription and is rebilled monthly. I have a simple members table that has a member expire date that cooresponds with the next PayPal bill date. I need a php programmer with PayPal IPN expirence to look at the current website setup and integrate a subscription button after the initial signup, and a return page (after payapl payment) that will set the member as active as well as establishing the timestamp for the expiration date. If the user cancels the subscription or it cannot be billed, set the member as inactive in the database so they cannot login. I will send all ftp and databse info as soon as I can see a sample of what you have done like this before, possibly a mysql table/ or portion of the php script that works. The timeline for this small project is 2 days.