ArkNinja

Yeah, it would be better not to use MaNGOS in my opinion, because there are much more flexible and better ways to do this. The amount of work you would have to do to convert MaNGOS over would be more than to write you own most likely.

You would need to have it almost exactly the same as WoW. If I were you I would look at the PseuWoW/MangosClient project, as it is doing the same as you want to do, but using WoW as the game, so you could probably modify that to create a new client, although all the extractors would not work with your custom client (as far as I know, I could be wrong).

Although 2.4.3 is not supported by MaNGOS, I would suggest searching the commits and finding out which commit fixed this error. This webpage: http://learn.github.com/p/log.html has a little blurb on how to search for commits using grep. I would suggest using:

git log --grep='shadowstep' --pretty-oneline

and then going to the GitHub site for MaNGOS and finding that specific commit and look at the changes.