You need to put the .MAP file in the KotOR Tool Maps folder.
In module editor go to File>Open Module Project and select the folder the git is in (NOT THE GIT ITSELF)
As long as you have that modules map in the Maps folder it'll open.
If it's your first time making modules though i'd recommend doing it the "complicated way" with K-GFF first so as to get a feel for how things work.
Closing cause of repeat thread topics (
http://www.lucasforums.com/showthread.php?p=2448121#post2448121)... -RH