like TruePraet. already pointed out the tutorials in the scriptorium will help you a lot but will require you taking the time to understand the hierarchie of files used/modded ...

Anyway to get an archer to use quick and dirty ... you basicly did the correct stuff, if thats an existing archer and all you did was add the "roman" tag than all I can see is that you did the correct thing, though I cant help suggesing not to use Hadrian and Caligula (?) tools, they are old and iirc all the people that I know of using it I know of cause they ended up posting topics "it crashes my game ....!!"

If the archer is available to romans, meaning the unit has been properly set up for you to use than all you need to do is add a recruitment-line in export_descr_buildings .. though I cant help think that the unit isnt, as if it would be properly set up why cant you recruit it ...?!?

I would almost say the unit has no texture in descr_model_battle, but that doesnt matter afaik when just on the campaign-map...


G