Modify Oscommerce

My plan is to have an oscommerce store where the clients buy online access to web pages and this is what I need help with as a "test": 1. I will be selling different "educations". So if you buy product "A" you will get access to lots of education pages associate with product A and also access to some files to download (super download shop already installed). The pages associate with product "A" are only to be shown to the clients who are logged in and have paid for product "A". I will also offer some traditional products to ship. 2. I need help to install a forum for my clients to use. It's supposed to be a limited access to the forum and you will only get access if you have paid for the product mentioned above. 3. I use PayPal Website Payments Standard and for products mentioned above I need no shipping address. Would be great to integrate this with PayPal so that the clients only need to enter their name and credit card number. 4. Most of the products are supposed to be on subscription. When you buy them you pay for example USD 99 and then every month you need to pay additionally USD 25 to still have your access to the "education" pages when you log in to your account. 5. I need help to install Header Tags Controller. If someone could help me with this as a test and it works out fine, I would be happy have a closer cooperation in the future! Regards, Carl.