[mcphearson]

The way I got it to work is:
1. Remove icshelper key.
2. Go to a site on the phone to enable data.
3. Without connecting the USB cable, open internet sharing, select USB under "PC connection", and press connect.
4. It should say something along the lines of "check cable connection" since the cable is not connected, so connect it now.
5. Windows will install something called "Remote NDIS Based Internet Sharing Device".
6. Enjoy tethering!

I have no idea what that PAM cab your talking about is, I'm tethering right now and don't have anything like that installed. It seems the important thing is to have a data connection active on the phone and pressing connect on internet sharing before connecting any cables to the phone. Otherwise you just get connected to activesync, which is NOT what you want.