Note:-Flashing Recovery is very risky you can brick your phone.
Download the attachment and extract both files to the root of your sdcard.
To flash: through adb shell or terminal type this from root # shell
#mount -o remount,rw -t yaffs2 /dev/block/mtdblock5 /system
#cat /sdcard/flash_image > /system/bin/flash_image
#chmod 755 /system/bin/flash_image
#mount -o remount,ro -t yaffs2 /dev/block/mtdblock5 /system
#flash_image recovery /sdcard/recovery.img
Key combo to boot custom recovery from powered off is vol_down + home + power and release keys at LG splash.
Recovery Key mapping:
Up & down : vol-up and vol-down
Select : Menu
Backup : Back
This recovery will not allow you to flash every ZIP file. so me too is using the thunderg recovery.
CyanogenMod 7 (gingerbread) ported to LG Optimus (p500 - T): http://www.mediafire.com/?dlukmb73w93tae1
This is a first release. Many thinks did not work. But the system boot up, and is good.
Thinks that don't work:
Think's that work:
GSM (Call, SMS, GPRS/EDGE, 3g)
Big thanks to mik_os for his hard work.