turned out to be faulty media, a new install DVD fixed it. Hope that simple answer saves someone else 2 days of looking for a more complicated answer that doesn't exsist.
Hi, Trying to install Small Buisiness Server 2008 on a 2850 server, but it always crashes with a 'page fault in nonpaged area' blue screen after completeing the 'installing features' part fo the install. I have tried installing straight from the SBS08 DVD, and also installing via the Dell System build tools, always with the same result. Have removed the DRAC4 card, disabled RAID (even removed key, battery and memory), disabled anything optional in BIOS, removed all but 1 drive, and 2nd CPU, updated all firmware to latest versions. Run full Dell diagnostics inc mem check. I really am out of ideas as to what to try next, any suggestions? Thanks Anthony  
Small business server 08 blue screen during install on PE2850