Quote Originally Posted by Djarid
has anyone tried using junction.exe to set hardlinks to a single instance of the WOW subfolders, leaving the config.wtf and Interface as a real entries?
I tried it, but it works not as perfect as you might think.
The Folders, were you setup Junctions, have to be empty. So you can't set a Folder "WoW_1" to point at "WoW_0" and have another Directory in it which does "WoW_0" not have.

The only possibility you might have, is to set junctions for every subfolder in "WoW_1"

But then, you still have the problem, that you have du duplicate WoW.exe and everything in your WoW Rootfolder...
A workaround could be a simple sync-batch, which copies all these these files beetween all wow-instances. (this shouldn't be much more than 15MB)