A-ha! Thank you newbiemodder, I think I have it now.
Just to clarify it for others ; name your tga map files "lbl_map711KOR.tga" and exchange the "711KOR" for the module name in your area file.
Note : It does not follow the name of the module when compiled, but the name in the are file. So if I stick "666nem.git", "666nem.git" and "module.ifo" into a modue named "024end.mod", I name it "lbl_map666nem" (without quotation marks).
KNIGHTS OF THE OLD REPUBLIC : THE JEDI MASTERS
PLAY THE TOTAL CONVERSION MOD NOW! . | If you're interested, my almighty fanfic can be read here.