are you able to get a data connection where you are?
did you hard reset after installing the ROM? i didnt, but i heard this can be important. if you flash roms alot.
some are also saying you need to install patch 1 soft reset then pastch 2 soft reset and so on. i didnt but heard it can be important.
if you are still up to it:
hard reset.
install the ROM again.
hard reset.
install the patch files into MAIN MEMORY ONLY.
install patch 1 soft reset, then patch 2 soft reset, then 3 soft reset the 4 and soft reset. open google maps.
check use gps. it will say searching for satalites.
give it up to 1hr
for the first time. mine took about 10 mins for the first time.
make sure you are outside and its not too cloudy and no mountains big trees in the way.
try leaving it by a window all night plugged in with google maps trying to connect to satelites. alla JollyRoger gps 101 tips.
hope this works