This install was asking for drivers dvd and nothing I used allowed it to find whatever it was looking for. I used a different DVD I had and that DVD worked first time and the machine is running fine.  I dont know what the difference between them was but something was wrong with it.  Its all good now.  The 2950 is still a problem but I'll start another post about that. 
PE840 running server 2003, tried updating to 2008R2. update goes all the way through then crashes on one of its last reboots. I am able to roll it back to 2003. Tried again and it asks for a missing driver but doesn't say which driver. BIOS was A05, updated to A06 but certainly I have missed something else. SAS driver is current, what is the 2008 installation looking for?  
Update PE840 to server 2008R2 - fails asking for driver?