First you will have to go in support area to download drivers (U880 compatible). You will need KGxxx usb cable (also working with original cable).
Power on phone and connect it to cable after drivers installed please now start QFG MODULE from FuriousGold directory.

Now select com port and select full flash (depend on your phone model) here we select KU311-V10e-SEP-29-2006-ORG.sex.
When you ready press DO JOB

Now wait for flashing process finish.

Now your phone is unlocked and accept any sim card. Please follow software instruction here. If phone is blinking please reflash in emergency mode (2+5+POWER ON).
If after unlocked the phone there is no network please flash file using NV files provided in support area. (KU311_NV.nv here for exemple)

It is same process for LG KU311, L600v, KU800 just files are different for each models of course.

Thx to Irfangk786 for screenshot ;)