(Note that this is only for those with the compatibility version, in the normal version this is already done.)
Backup the files that you are going to edit! If the game does not start or you run into errors you made a mistake and you need the restore the original and try again with paying more attention.
Part I
Open the file
export_descr_buildings.txt in notepad.
Search for the string
Orc Band.
You will find lines like this one.
recruit_pool "Orc Band" 1 0.5 4 0 requires factions { england, } and region_religion catholic 15
England is Mordor, France is Isengard so it's quite obvious. Replace it like this:
recruit_pool "Orc Band" 1 0.5 4 0 requires factions { england, france, } and region_religion catholic 15
You must do this for all (!) instaces of r
ecruit_pool "Orc Band" where you see
{ england, }.
Part II
Open the file
export_descr_unit.txt in notepad.
Search for the string
Orc Band.
Get to the part where it says:
ownership england
era 0 england
era 1 england
era 2 england
Replace it so it looks like this:
ownership england, france
era 0 england, france
era 1 england, france
era 2 england, france
Part III
Open the file
battle_models.modeldb in notepad.
Replace the part from
8 orc_band to
14 morannon_guard with this: (but do not touch anything from the
14 morannon_guard line)
With this:
Replace the part from
25 mordor_captain_early_flag to
14 mordor_captain with this:
(but do not touch anything from the
14 mordor_captain line)
With this: