OK, so I made a map from scratch in DoomBuilder2 with the asset files included on the A&A Website. It was a simple interior map with a few baddies, a Player 1 start, and an exit point. I copied the .I, .GEN, .LIT and Sxx.SRP file from map 301 per the Wiki's suggestion. I also did the MAPDESC copying of the files in that folder and I edited the files to fit with my map and corresponding map number. When I loaded it, it would hard crash the game. I went in, and deleted the baddies, and tried it again. This time it loaded, but when it loaded no map showed up, the screen remained showing the town dialog / GUI menu, even though the music began to play and I could swing my sword, cast spells, etc. etc. Whenever I would perform an action, like swinging my sword, for instance, the sword animation would drag across the screen, with every frame of the animation staying on screen. When I would abort the mission and go back to town, the game would then crash. I am not sure what to try at this point. I also read about the 3D Camera object that DoomBuilder puts in the map, but I could not locate this object / camera, so I don't know if that was even in my map or not.