I believe I have the central install server setup properly as an NFS share on a non-virtual OES linus server; however, no matter what I've tried I get the following error when I try to install a virtual OES Linux server:

Could not find the SLES9 Installation Source
Activating Manual Setup Program

I'm booting from CD1 and trying to transfer control to the NFS share. Is it valid to expect DHCP to be working at this point or do I need to use PXE and a PDHCP server? I have also tried specifying "manual" at the install menu but never get offered a network install several screens later as the documentation says I should.