Having problems with the Arsan Hood HAK (see pic below):

I downloaded the HAK from nwwault, and placed the files (3 x .dds and 24 x .mdb files) in my Override folder as instructed...and it didn't work. I then put them in my NWN2_MODELS_X1 as well as NWN2_MATERIALS folder respectively, but still I can't see the hoods correctly.
Am I missing any BG files?

Any suggestions?