wow dude, don't do this crappy method for mop !
uv mapping and blender part is only for cata and wotlk because some options are not included, like 1024x512 uv mapping and geoset limit
On mop you have just to :
Edit charsections.dbc
Rename files without _HD
Activate uv mapping 512x1024, like the pandaren
hey
which file i should edit to enable uv mapping 512x1024?