First, yes you can add any enchantment you want but this is done with hex editing rather than the mm8lvleditor. The reason I can't really tell you how to do this is because my method of doing it is not very "scientific". I basically just go into the code of the game and make guesses (albeit most of the time they are somewhat educated guesses) and then I keep trying till I get it right, I've had the game crash on me quite a few times before I finally get it.As to Nighon, I just connected the Mt Nighon tunnels to Stone City tunnels, then where the tunnels to Eofel exit used to be I just connected straight to Land of the Giants, I always hated having to go through so much to get there as well, especially when I wanted to get my knight his GM Armsmaster, I still have Tunnels to Nighon and Eofel in my mod, they are however found in the Barrows since I also did some modding on those as well so I wouldn't always have to go through all those annoying barrows to get to the meditation spot. Yes you can also swith entrances with regular houses, but let me check on that as it's been awhile since I've done it and I'm not exactly sure what file that info is found in, but I think you do it much the same way as the dungeons, they are just harder to find since they don't have all the do1.evt and what not to look for.
