I feel dumb, but I can't find anywhere in the installation instruction where it tell you how to set up dhcp. The only thing I see is a link telling you that network boot is an advanced topic. When I click the link, it doesn't really tell me how to do it. It just tells me what I want to use to do it.

tftp-hpa is started with xinitd, I think. I assumed it was. If I put the files back the way oscar made them and restart dhcpd and xinitd, it will network boot and install RHEL.

I'll try and add 'option tftp-server-name "192.168.0.1";' and report back in a second.