To the two posters above me, and maybe more...
I had the same problem as you guys, wow would just crash to desktop without an error, seconds after clicking the wowME launcher.
Then I remembered the old edit used to be placed in a folder within the \DATA folder, like DATA\POISONS\ . I tryed that and it seemed to work, atleast now I can launch it.
I bet Unreal took for granted that we just replaced the downloaded mpq with the current inside the folder

But for alot of first time downloaders of this awsome edit, that was not common knowledge
Anyways give it a try...
edit: nwm it dident work... There is still something wrong with this edit om afraid.