drop the GearGame folder in your GOW3 game folder (BASE FOLDERS)
drop the TU6 files in 4D5308AB\000B0000 (TITLE UPDATE 6 FOLDERS)

*the TU6 files can be combined in the same folder*

YOU CANNOT USE THE BASE VERSION FILES WITH THE TITLE UPDATE AT THE SAME TIME.
also backup the original files if you want to play on TU6

Credits to TudorHorse/Sowa_95 for finding these fixes. :)