Hi - I finding the same problem with my Q9h flashed to WM6.1 - Upon exit, the settings.exe file has error messages and doesn't update the registry.
Apparently the file is "Windows Mobile 6 SDK\Tools\GPS\settings.exe" and has a problem on my Q9h with WM 6.1
My external BLUETOOTH GPS works great with Google Maps, but not with Garmen XT.
Has anyone had success with getting an external Bluetooth GPS to work with Garmen XT in this environment. Tricks, tools, registry editing???
Thanks in advance.