video driver rollback for Mobile Intel(R) 965 Express Chipset Fami

Hello,
I have a Gateway ML6721 running Vista Home Premium with all the latest. One
thing I've noticed is that video driver rollback is never available. This is
annoying as every third or forth driver update or so contains a broken or
disabled feature. The latest problem is that switching between external and
internal monitors does not work, either via the keyboard Fn-key combo or the
video display option menu. Is there any way to install the previous driver
that was available through windows update? FYI- I have system restore
disabled as it never worked for me anyway (available restore points were
never "available")
Thanks