GPS question. Advise please?

I have a question. I recently installed a hybrid and GPS seems not working. I got a little 'crazy and suicide idea".

If I replace the UMTS file (version A) with another say from version B, is it possible to solve the problem? I mean it is a long shot but is that possible?

Basically my question:
1. GPS files in UTMS?
2. If yes, I am thinking it could solve my problem (I could try)
3. Do you know which files exactly does the satelite locating / GPS file in RIM folder?

Thanks in advance!