TrackEm (PHPModule.googlepages.com/home2)
Install the simple PHP-based module, and be on your way to tracking your modules. Finally, a way to track em.
Author: Curtis Glass
Source: View XML
Related module: PackageTrackr



Full Setup Guide : phpmodule.googlepages.com/home22
with pictures, to make the process as easy as possible.
It's as simple as uploading 1 file, and adding about 10 lines of JS/Prefs to your existing modules, and voila, user registration with tracking.
I realize it's not the perfect way, but Google doesn't seem to help us out very much. As I get more time/ideas I will update the software, but this should hopefully help you get an idea of who/when your module was installed.
Requirements:
-PHP4 or Greater
-MySQL (most versions should work)
-That's about it, happy tracking!