Help needed with subscription system

Hi,

I'm after some help with the concept of this. I'm inexperienced with eCart and need a guiding hand.

I'm setting up a website for a client. The site is a learning centre. I've already set up the admin section for each course and the page on which it is displayed.

I've set up the payment buttons which go through to the shopping cart and then the check out. It even goes to PayPal standards where I could buy the course if I so wished.

What I need your help with is the next stage. The "student" upon buying the course or courses (yes the client wants them to be able to buy several courses at once) then needs to go back to the site to find that the course(s) they have bought are now free of any restriction and they can just use them.

I used the checkout wizard to set up the cart.

From previous limited experience I know that they need to be returned (from PayPal) via an IPN? Is this something that eCart does or is it something that needs to be set up by hand? If the latter is true; how?

Any help from anyone would be most appreciated. I'm not after anybody doing this for me. Just some pointing in the right direction.

Many thanks.