Yeah, I tried renaming, then deleting the /local/English folder. No luck.
As for the bunker, if my memory serves, there is an M32 grenade launcher in there somewhere, I think maybe lying on a table. It was definitely my first thought, so I loaded up the training mission and equipped the M32 to see if it would cause the crash there as well. It worked fine. As for the presence MrCs, I don't know, but I don't think they'd be there.
Thinking about it, I think the bunkers can actually be ignored, so I guess I'll try that for the time being.