Hello, I have a vBulletin Forum Script for providing PDF books since three years. It is a good forum software BUT is not good for uploading and downloading of files. I have searched a looooooooooooooot but I cant find any script/cms/blog/etc which could accomplish some features of what I need. I tried Wordpress, Joomla, Drupal and some others but... Requirements: I am going to start a new site which will have more than 800GB PDF files. I want to limit/restrict the bandwidth based on usergroups (e.g; Bronze, Silver, Gold). I dont want a user to become a Premium Member for a week and overload my server by downloading all 800GB within week. After going through a lot, I have decided to ask here with the hope of getting suggestions.