Server 2003 is not supported on the R210 II, which is why SBUU/SMTD didn't list it.  There is a very good chance you won't get this installed directly on the hardware and will need to use a virtualization option. I'm not saying it "is" impossible, just that it "may" not be.  What RAID controller are you using?  Does your 2003 media have SP2?  What is the BSOD stop code?
Hello -   I am trying to set up a new PE R210 II server with W2K3 Standard.   After pulling it out of the box, I booted to the Dell CD to configure the RAID (Raid 1)   Then I booted to the OS CD (Unable to use the Dell CD as it does not offer W2K3 as an OS option) and it loads all the Windows files, gets to the Starting Windows screen, the crashes.   I initialized the disk, I did a consistency check on the disk, but it keeps giving me the BSOD during the OS install.   What am I doing wrong?  I've never run into this before.   Thanks, KBeau
BSOD during OS install