[Rural Guy]

The other thing you can do is when you go to the greyed out Active sync icon on your task bar on the PC, right click it, go to connection settings then uncheck the "Allow USB connections." That will stop it from recognizing the Touch for activesync (assuming you connect with USB) but tethering will still work and it won't kick you off. Then when you want to active sync just recheck the box. That's a lot easier than changing registry entries every time you want to tether and then re change them when you want to active sync.