Thank you for the extreamly informative reply...I'll be linkin when I get home tonight

Edit: So let me see if I got this right"

  1. Make 1 installation of WoW
  2. Create 4 duplicates of the original installation omitting the \Interface and \Data folders
  3. Symlink each of the duplicated wow folder's Data & Interface folders to point to the original installation's Interface & Data folders.

Thats it?