script updates

I have a script that needs the following updates add the ability to user to create account to list their site users need ability upload zip file (admin limits size and can disable) User can add images for their listing (limited in size set by admin) Users edit theirs listings(listing will be approve/disapprove by admin user can buy points! points will be used to allow downloads sample: 100 downloads 25.00 so a paypal system needs to be added, the site will host downloads which the user van use to host their files, so when a site visitors wants to download from a certain hosted file the can do it free Any more details post in you messages