1. I tried to play a singleplayer mission (i.e. t1l1), when the loading screen was about halfway finished it blitzed out and went back to the main menu.
2. I took the afore mentioned map into the new MOHRadiant and added some Spearhead stuff. I then compiled it
3. I then started up Spearhead and tried to play my map. It was the same as 1.
4. After that, I went to MOHRadiant and removed all the Spearhead stuff.
5. I then re-compiled the map and tried to play it in MOHAA. The results were, again, the same as 1.
I did not have these problems until I re-installed Spearhead.