I've played that mission not long ago and had no such problems. I've played it millions of times on the Russian version, so I got a routine. This is what I did:
Run to Krauff and talk to him.
Disarm the bomb using the color code from quest item, before the enemies appear
Kill the enemies
Talk to Krauff
Talk to driver
Pick up loot
Talk to Krauff and you'll automatically leave the sector.
If this doesnt work for you, I can't help you. The CTD has to do with something else. What does your log file say?
R@S
EDIT: I forgot to let you all know that there is a new hotfix to my mod:
The B.F.X. Mod Hotfix 3
And the next version will be released on Friday, if you're interested. More fixes will be included.