http://files.filefront.com/startpose.../fileinfo.html
All usable nations are playable, with this slight sub-mod.
Go to programdata/steam/steamapps/common/empire total war/ data/campaigns/main and replace startpos with this. I recommend you backup the original one if you want just the original one
this is (to my knolodge) is the only faction inclusion mod that works for this mod