Default [Q] how to convert .kdz file into flashable zip file with CWM

hELLO
i HAVE Downaloaded latest .kdz file from LG-P990 Offiicial binary and i have installed CustomROM (CWM) and would like to install .kdz from CWM.

Hence i need to convert .kdz file into flashable via CWM. Please let me know if some one did this way ?