Question : WordPress FIle Manager w/ Database Integration

I am making a members portal through WordPress. The member account, login etc. I have already figured out, was pretty straight forward.

What I'm looking for now is a file manager plugin for WordPress. This plugin on the admin side will allow the admin to upload files, and create different categories for these files. Additionally, the files and categories will be databased, meaning each file will of course have an ID in the database. I will then build a relationship table between the members table and file table to allow members to track all files they have downloaded and their most recently downloaded files.

Does anyone know if such a plugin exists? If so, please provide the name. If it doesn't exist, and I have to build the plugin myself, do you know if any pre-built scripts that will work with a self-authored plugin for managing file categories and files in a database?

Thanks!

Answer : WordPress FIle Manager w/ Database Integration

I ended up creating the categories plugin myself and attaching it to the media library menu. Additionally, I installed WordPress 3.0 and MU to allow me to have 2 media libraries and load the files in two different locations. The first site (the base site) manages her CMS, and the frontend of the site, including files/images attatched to pages/posts. The second site manages the media files used for the member portal. WordPress media library is actually very nice and databases all files, however does not support categories for files, which is where my categories plugin I built came in.