Flashing a preGPS ROM as in the The Wiki form PPC Haven & not letting the customizations run will give you stand alone GPS functionality.
http://wiki.ppchaven.com/index.php?t...IX_VERIZON_GPS
My phone originally came with WM6 installed. When I Flashed to 6.1 I never let the customizations run. I was able to obtain GPS locks. However I had to do a lot of tickering for it to work every time. I have it working flawlessly with TomTom 7 using NFSFAN's ROM.
But go ahead & write your tutorial as it might benefit someone. As I have hear of people having problems with the 2.03 PRI.