I'm no expert, just passing on what works for me, prior to doing this it was like waiting for water to boil, gps viewer would find the gps functionality, but it wouldn't retrieve data, a lot of ,,,1,,,3,,,etc instead of 0,23,54,34,23,43's, if you have used the program you will know what I mean. I have been playing around with this for a few days now, best results were with installing the sprint ppst cab, but I didn't like the idea of keeping anything sprint, so I flashed back to stock to make sure I was sprint free. The OMJ oem rom have sprint's music store in the cube, as does the custom bell rom, which I am not thrilled about, have to reassociate that to the HTC audio manager. But everything is working properly now, so I'm happy.
I ran the stock bell ppst cab and no gps, I had tried running the sprint ppst file by itself from a freshly flash OMJ rom, it did nothing since there were no data files. Also no GPS. I put the sprint ppst.exe in windows after running the Bell ppst cab, and voila, GPS works. So, if the only difference is the main executable installer, then that is the file that has the functionality.
All trial and error, lots of errors, but luckily with this forum, nothing you can't recover from.
