i didnt have that issue, but honestly i would play it chronologically so you can appreciate the improvements rather than get used to them then downgrade. fnv has some nice new features and if you spoil urself u wont like 3 as much
im getting both games for pc later today, gonna play nv first though
ive been watching moonmoon play nv and it crashes a lot, is that really a pc issue?
i only had like 3 or 4 crashes on my first playthrough
either quicksave frequently or get some mods that fix it