I have a T-Mobile G1 running CyanogenMod 188.8.131.52. I have never been able to get USB Tethering ("Internet Tethering" in the options) to work on Windows XP. (It works on Windows 7 without installing anything.) I downloaded some HTC software that someone recommended to enable this to work. It was the HTC Sync software for the Hero. It didn't help at all. I plug in the phone with tethering enabled and nothing happens. No alert box saying that the device was found, no new connection in my Network Connections folder. All I get is a device in Device Manager named "HTC Remote NDIS based Device" with a warning icon on it. I've been using Tetherbot via ADB at work, but it's flaky as hell! Has anyone gotten CM's built-in USB tethering to work on XP?