Hoover, not entirely sure if that thread is valid - depends largely on what you're using. From the thread, Shadow says:
*UPDATED 10-11-08* Alltel Has released an Official WM 6.1 ROM, It is ALREADY GPS Enabled. If you have the Windows Mobile 6.1 ROM, this thread is of no use to you. If you have the old 6.0 ROM, this thread will still be of use to you. You can get the new 6.1 ROM and ignore this thread.
Official Alltel Windows Mobile 6.1 Rom ppc-6800:
http://216.139.227.226/alltel/RUU_TI..._PPST_Ship.exe
Sounds like what he's got up there is a way to enable GPS for 6.0 ROM. If you've got the 6.1 (which I assume you do since you have GPS already) I don't know if that'll be of any help.
I do hear a lot about GPSToday. Would be lying if I told you whether I knew I had it or not... currently working off OMJ's ROM and the GPS works great (much better than with the official Sprint ROM sans GPSToday).