It does it when I am launching a mission, I can open the game ok and select a mission and map, but it crashes after the 5,4,3,2,1. you would think its a video card/driver problem but it works sweet without the HX5 mod.
I have plenty of ram (512mg) and a good enough system, and the game works fine otherwise. I have reinstalled the game to make sure there are not legacy mods lying around to stuff it up lol!!
I have a mate that has the same problem as well.
Regds
JF