We just started using Zone Trigger 2 on our secondary track (Light bridges are back ordered at the moment). The Demo Worked SO well, we are ordering the full version of the software. The demo works great, so give it a try. We found that if you set the zone trigger to about 10%, it eliminates all falses, and catches the car at full speed. We are using a QuickCam 4000, it's about 4 years old, and it works great. I would suggest at least a 1.8ghz processor, at least 512 megs of ram. Again, the more the better in these specs.