The best thing would be to simply record your screen and make a video file of it every time when you install/uninstall something.And call each recorded video file something like: "13.06.2012. - Mozilla firefox 5.0.1 was uninstalled.avi".
That is how I do it.I record EVERY SINIGLE INSTALLATION OF ANYTHING,UNINSTALLATION OF ANYTHING,MODIFICATION OF ANYTHING and so on...
I use BB flash back recorder for recording and BB flash back player for converting the recorded video file to XVID AVI video format file.
Cheers!