Touch Screen Set up for iBook , any ideas..

So I bought a clunker G3 iBook and wanted to  make it a touch screen unit.  I called the people at Troll Touch Screens and go a very unsatisfactory we will not sell you the parts, unless we do it here at the factory. Thumbs down for them. especially at $649

So I searched elswhere and saw a couple items, but particularly this on one ebay that looked attractive:
http://cgi.ebay.com/Touchscreen-Touch-Sc...1QQcmdZViewItem

But I am curious where I could find a driver for it
or somehow make OS X belive its the track pad.

Any ideas?

the ibook g3 trackpad uses a adb bus i think, the g4 uses a usb bus, so it would probably be easy to mod the software of the g4 to get it to recognize the touchscreen as the track pad; i have NO IDEA on how to do this, so if you pull it of PLEASE post a modguide!
good luck!

check this one out... alot more affordable
http://www.touchscreens.com/mt1214pc-usb.html

Actually good news on that from I found out that thier supplier has much cooler options:
http://www.magictouch.com/KTT-120LAM.html

So thats a start, thought I will be curious to see if OS X will let it runInk or Inkwell as it is.

Thanks for the helps guys!

I assume I will be posting more questions.