The problem defintely lies in the
RAM. I took out my 128 stick and left the 256 stick in...all crashes etc gone! Weird thing is...the 128 stick was expensive crucial cas 2 PC133
RAm, while the 256 stick is some unbranded generic stuff!
Thanks for your description of the PCI time out Aidan, I couldnt find a web page out there that describes it.