check the EDU file it now allows you to set a specific folder for the units textures, so for the english longbowmen to be useable for other factions just tell the EDU to look for the textures in the english faction folder

or copy it to the merc's folder

anyway creating merc's is easy, just make sure that one of the 2 above mentioned things is done so the unit-card etc is used correctly and add the unit to a merc-pool ...


G