HaloMods "Classic" Read-only Archive

ok, i downloaded a script for gmax that allows me to import obj files in gmax so i can change them. BUT the problem is when i click run script and find my script and go to import the obj, it says "no appropriate import module found" , so i click ok, when i do click ok, another message pops up that says "improper file format"

what do i do to get this script running??
please help

gmax doesn't like you

Use 3d studio max, it works.

does it cost money??
n/m i found out it costs a lot.

im using gmax because i like free things, so if anyone knows what is going on with the script with gmax, it would be appreciated.