If you are Symlinking then the only files that should not be actual copies of the original should be those files you are Symlinking in other words your WoW1-WoW5 should all have the Exe file in them along with everything else copied in there. Except for Data&Interface folder which you will want to Symlink, so main folder has everything, second-fifth folder has Data and Interface Symlinked. I use same program Ualaa mentioned with 0 issues running Win 7-64.