Another gps question....

[Huskerfan]

I have the 6900 with rom 3.37.15 and radio 3.02Nex--It's Hulk's rom from last year.

gps was working pretty good and still was working up until a week ago.

I added a cab last year to get gps working but can't remember the name. It involved changing the PRL and PRI (I have PRL version 51309 and PRI version 1.37_002)

Would gps work better if I installed Valhalla or use the aGPS fix?

I've been reading for 4 hours now and found a lot of conflicting info....
Any help would be appreciated.