I flashed this ROM and everything is working great
[ROM]HellFire Sandwich v 1.4 p999 4.03(optimized for speed and smoothness )31412 - xda-developers
Follow all the instructions, download the ROM, the gapps, and you could use the G2XScrubber to wipe everything all at once. If not just remember you must wipe data/factory reset, wipe cache, and wipe dalvik cache, then flash the rom and flash the gapps.
Hope I helped