See if this guy can help
http://forum.xda-developers.com/showpost.php?p=54893808&postcount=74
also u can try this (PLEASE OD THESE AT OWN RISK AS I AM NOT A DEV AND NOT TRIED THIS BEFORE)
http://www.lg-phones.org/how-to-convert-lg-firmware-from-bin-tot-to-kdz.html