You can't create new units, You can only edit units.
you can but that would be removing another unit.
such as if you want 2 marines
you would have to get rid of a unit like a ghost and change alot of things such as the gun, the looks and everything. Its possible, but it takes alot of hard work.
I don't know if its been mentioned before or not, but wouldn't it be possible to remove the "extra" units (IE: Unit 1123), and replace them with normal units?
u can make new units by replacing the unused or extra units that never effects or is in sc, so replacing those doesnt really matter...
wow! it seems like no one on this site has ever heard of
SCExit hast been updated since 1.07 so its not so usefull anymore.