Probably you've already seen this video in which a red ball moves around the ThinkPad desktop using Active Protection System (APS) infos:

http://www.youtube.com/watch?v=iKzGW9huzMc
Well... I looked for that "game" and I found out this:
http://blog.objectgraph.com/2006/07/thinkpad-ball.html
It seems pretty easy to use, but it doesn't work on my T61...
Maybe someone already knew this and how to make it work??
Thanks a lot
PS: Congratulation for the forum!!
MOD EDIT: Picture warning added.




