also my game crashes when I load a different cell while playing any songs I use GNR more where that came from.
This also happens while playing vanilla GNR.
Not sure, but one of these might help:
http://fallout3nexus.com/downloads/file.php?id=9719
http://fallout3nexus.com/downloads/file.php?id=7876
http://fallout3nexus.com/downloads/file.php?id=10127
http://fallout3nexus.com/downloads/file.php?id=9606
I haven't used them myself, so you'll have to read up them yourself and see if they are appropriate.
Ok here is another question what is the best stutter remover than makes my game less laggy so it won't crash?
http://fallout3nexus.com/downloads/file.php?id=8886 is the
only stutter remover I'm aware of. I haven't tried it for a while, but it
kind of worked. You'd have to try it for yourself, but I would try reducing your graphics settings first. http://www.tweakguides.com/Fallout3_1.html has a good, um, guide.
~Xeph'