Try D3 module PICO from Gijoe's website

(D3 modules generation are developed for XOOPS Cube, so you may face some issues)

You can rename PICO to whatever you want and need.
Then create a directory and category with your user names
You can set permissions by user and you can wrap documents.

Use fckeditor, personalize it and extend it with ajax multimedia/doc management.

Finally with PICO you can also create forms for each user and, or for all
to contact you, require support, etc. (store and manage it from admin, email, etc)

You can also personalize language variables and templates.
So, make it cool with some ajax interaction ^^

Have Fun !

P.S. Do a search on Gijoe forums and you will find almost everything!