Use folders as you know them from your operating system to organize your shared files.

"xpeers document management system"

All files are automatically under version control, you can restore an older version at any time by pressing the "history" button to see a list of older versions. This simple version control system makes life a lot easier because you can do a fast roll-back and see who has changed a file at what date & time:

"xpeers history of file changes"