Ask Glitchy, I am just a user of his program so I don't know what the errors are and all. But what I think is that either the model is to big or to small that it can't be viewed, so you need to change the scaling and so far there is no m2 > obj converter so that isn't possible.
Hey soul Im curious to how you go about custom model edits and getting them into the game, I've tried the tutorial with the stealth bomber and my model shows up invisible in the game? Also how do you go about editing models thats already in wow. m2 to obj coversion?