Thanks to mailart from
He made it possible to flash Canada/US (Bell/AT&T) P930 Rom on LU6200/SU640, drivers all work properly, also he wrote a program to install cmw recovery on the LG LU6200.

Following is a simple guide of the LG LU6200 root/recovery/patch(WIFI and Sensors) installation:

ALL Scripts DL (translated to english):

1) Root
Run Root_EN.bat to root your device.
Your phone will automatically reboot twice during this procedure.

2) Install cmw recovery
Run Recovery_EN.bat to install the cmw recovery on your rooted device.
How to enter cmw: Press volume- and power button when your phone is off, your phone will reboot and pause on the logo screen, then press volume+ to enter cmw (press volume- to do original wipe).

There are two ways to flash US/Canada Rom into your LG LU6200.

The first way (Recommended):
Download patched recovery backup files,
Canada version backup file uploaded by mailart: clockworkmod.rar
mirror uploaded by hoangnova: Free Cloud Storage - MediaFire (SUM 7ac3c4714290f1473521c245e184ae5e)
Extract the files to tf card then enter cmw to restore your phone using these extracted files.
Don't forget to select your prefer language, this is a multi-language rom.
If there is any hardware function doesn't work, please try to run patch6200_EN.bat.

The second way:
cmw is not necessary for this method, but you have to root your device after flashing system.img
Download P930 system.img file:
Canada version P930 Bell (Recommended) DL: system.img
mirror uploaded by hoangnova: Free Cloud Storage - MediaFire (SUM 0ad6159a85f1293944da2d7ba73edeb1)
or US version P930 Nitro HD DL:system.img
Move system.img to the "Optional.FLASH_P930_SYSTEM.IMG" folder, check your tf card at least 1G free space.
run Flash_P903_EN.bat to flash system.img, run Root_EN.bat to root your device, then run patch6200_EN.bat to patch, it will fix WIFI and sensors drivers.

P.S. The second way also works for a rooted LG SU640, please run the corresponding .bat files.