questions/hints you left unanswered from the beginning of the thread:
-Do you have the newest motherboard driver?
-Did you use driver sweeper (newest version) in vistas safe mode after uninstalling the old drivers?
-Did you overclock the GPU's? What are the GPU's temperature sensors reading?
-How old is your windows installation and what did you do with it?
Programmer error is very unprobable, because you are the first one to report this problem. Also the error message states it's the nvidia driver.
Ok, it might be programmer error... in the nvidia drivers or elsewhere.
There is also a chance your computer components don't work well together and Mount&Blades code uncovers a weak spot. Mount&Blades error? I think not. You can't fix every problem of inter component communication in the software itself.
Mount&Blade surely is not the only game not working, it is the only game not working you have installed right now. Besides 8 working games out of how many thousands?
Mount&Blade likes 64bit environments very much. It adores them.
Answer the questions you've been asked before criticizing that people don't help. We are trying to find a problem of several programmes working together, each consisting of thousands to millions lines of code. If people ask for information, be it so small and seemingly insignificant (like using driver sweeper), you might want to supply an answer if you want answers yourself.
Here are some more ideas:
-Do you have sli, or any sli profile activated while running Mount&Blade?
-do you have a sound card installed? Vista is known to crash in some situations if a sound card is installed (it just needs to be physically installed, no need for drivers.) If so, try taking it out.
-did you ever try to revert to an older nvidia driver? It's probably a change in the newest drivers that caused a problem. It happened before on ATI's side. They needed a few months to fix that problem. Maybe revert to a 2-3 months older, stable release to make sure.
I do still think the problems lies within the nvidia drivers.
The file dump of the bsods would be very interesting.