Is this possible??

[Ibn-Khaldun]

Of course you can do that ..
But you should first ask the creators of arthurian tw do they allow to use them in your mod .. it's polite that way

EDIT: 100th post

[Romanman]

oh you completely misunderstood me Im doing a mod that has no relation to arthurian total war but atw is so good i don't want to uninstall it.

[Charge]

if i understood you correctly, lol you cant just copy entire vanilla folder for non-modfolder mods, if it already modfoldered what's the problem? :)