maybe there is a way on mw2 to get map pack working
when you rename or delete defualt_mp.self
the maps well come ..
but when you start the game with the map selected it will get an error
i think that error will be : (could not find zone mp_crash.ff)
if we put the right files like :
mp_crash.ff
mp_crash_load.ff
and the map .pak file
maybe it will work ..
<< and sorry for my bad english