Aaaaand, this should do.
http://www.megaupload.com/?d=OHCGCTEJ
Simply paste this into;
Mydocs\Penumbra\Black Plague\Saves\Auto
And you should be good to go.
This save is taken directly after you 'escape' with the green mineral rock, which is the final ingredient in your cure.
At least I think that's where your crash happens; the moment you click on the door to leave.
If the crash happens when you finish turning the lever; I can also give you a save for that.
Please
-REP me.
Honestly, please do. I want to see how low I can go!!
Ignore that error message too. Just ignore it and keep going to give me -rep.