Have a look here
http://forums.techpowerup.com/showthread.php?t=112556
And check post #14 and #15 in this thread...
But I doubt it will help you against the freeze... that sounds more like a hardware problem to me.
Unless you mean it only freezes for some seconds and
then continues?
On the other hand there are no negative sideeffects when using the LAA-fix, so it wouldn't harm anything trying it.
How much RAM do you have?