-Find War3.mpq, War3x.mpq, War3xLocal.mpq, and War3patch.mpq.
-Copy those mpq and paste them in your model editor folder. (The folder that contains the War3ModelEditor.exe)
-After you paste those mpqs, open the model editor and when you click the mpqs in the list, it should open the mpq and you can find a lot of folders. these should contain models and blps.