Couldn't a person make a tiny map that has the quest on the actual design? Then you can test the quest to your hearts content.
Edit: Yup that should work. Just place the quest next to each start point and you should find it without cheats. Time to create less than 1 minute .
I tried creating a tiny map, but I couldn't get a starting point to actually appear on the map. I chose Starting Points from the palette thingie along the left of the screen, chose Starting Point 1, and right clicked somewhere on the map, and nothing.
When I saved the map, I went ahead and chose random starting points, and when I reloaded the map, there was some starting points on the map.
So I tried as new game, specifically choosing my "custom" map, and when the game started and I hit Ctrl+U to reveal the whole amp, it was certainly not my map at all.
I do have "Use Mods" selected in my options, but I have no idea how to do this. I have tried several different times, and can't get anything to do anything. It's kinda frustrating because I really want to make a map with a few custom quests purely for my own entertainment, but can't seem to accomplish anything.