I downloaded Open Enterprise Server 11 SP1, burned it to a DVD and am attempting to do a new install on a Dell R510 configured with an empty RAID 5 array on a PERC H700 Controller.

47% into the installation, while "Installing boot manager...", a YaST2 message pops up with "Error occurred while installing GRUB."

Then there's a bunch more info:

GNU GRUB version 0.97 (640 lower / 3072K upper memory)

[Minimal BASH-like line editing is supported. For the first word, TAB
lists possible command completions. Anywhere else TAB lists the possible
completions of a device/filename. ]
grub> setup --stage2=/boot/grub/stage2 --force-lba (hd0,1) (hd0,1)
Checking if "/boot/grub/stage1" exists... no
Checking if "/grub/stage1" exists... no

Error 15: File not found
grub> quit

Does anyone know what is causing this error, and how I can fix it and get OES installed? Doing a search turned up many references to a grub error 15, but the situations are all a bit different from this one.