I was just wondering because I would add some stuff on the Crusader Kings 2 page about 2 of the mods, one of which got a lot of press from gaming websites (the game of thrones mod) and the other (CK2+) caused Paradox to hire the modder in question and is the most used mod according to their tracking tools.
Also the wiki FAQ isn't working and I'd assume that's where the answer to this question would be?
I mean, some of the images from the game of thrones mod are already in the image database for the game so I would assume so but I'd rather make sure first.
edit: or, if not that, do/can I add it to the Clausewitz engine (the engine the games are in)? I mean the engine is very easy to mod and I'd assume that's something that should be added