40865 Download Manager

I need a very simple download manager according to the following specifications: - the site has 15 free courses you can download - visitors should be able to download upon registration .. only 10 - that limit should be set "per email" (only 10 downloads for a given email) - those 10 courses should be downloable only 1 per registration - subscriber should re register each time he wants to download another one (up to 10 times) - the registration form should have a security random characters input box to avoid automatic registration Download process (yet to define wich one will we use) Option 1 - for each registration process the system should generate a password - that password should be automatically emailed to the user - the user would go to a download page and login with that password - the user will upon login will be able to download only 1 course (out of 15) - also that download page should have the same security random characters input box Option 2 - for each registration process the system should generate a dowload link for the selected course - that link should be automatically emailed to the user - the user would download the course clicking on that link - the link should expire in 72 hours - in either case after download the system will send a thank you email - and 30 days after a follow up email Upload process - the course will be changed often so upload/downolad will be coded with numbers (not names) - so there would be course 1 .. course 2 ..... up to course 15 - probably will need an upload page where you indicate wich course/number you are uploading - probably this will not be needed as we can simply ftp the courses keeping the same name (number) Backend - user data (data entered in the reg form) - dowonload info (quantity - downloaded courses - date) if you have something similiar done by you, pmb it, your bid will be preferred.