- Wikipedia
To use the M3A1 Halftrack, copy the folder of the skin you want to use into your mod, but make sure you add the 'M3A1HTSREF.dds' file as well!
Only one copy of 'M3A1HTSREF.dds' and 'fx_triggers_M3A1HT.ftsxml' files are needed for your mod.
ENJOY!
-Smitty