Red Hat Desktop 5.5
I think I was successful in screwing up my yum configuration, I might have removed a few repo files too many.
I wanted to add rpmforge to my repositories and wanted to install yum-priorities and it is telling me "No package yum-priorities available".

As I am sure it exists and my machine is not finding it it only leaves operator error/screw-up.

What are the default repo files for Red Hat desktop and where can I get them?

Red Hat doesn't use repo files with yum. Send the output of
these two commands.

yum repolist
Loaded plugins: rhnplugin, security
repo id repo name status
adobe-linux-i386 Adobe Systems Incorporated enabled: 18
epel Extra Packages for Enterprise Linux 5 - i386 enabled: 4,621
rhel-i386-client-5 Red Hat Enterprise Linux Desktop (v. 5 for 32-bit x86) enabled: 6,325
rhel-i386-client-supplementary-5 RHEL Desktop Supplementary (v. 5 for 32-bit x86) enabled: 544
rhn-tools-rhel-i386-client-5 Red Hat Network Tools for RHEL Client (v.5 32-bit x86) enabled: 428

yum --enablerepo=* repolist
Loaded plugins: rhnplugin, security
repo id repo name status
adobe-linux-i386 Adobe Systems Incorporated enabled: 18
rhel-i386-client-5 Red Hat Enterprise Linux Desktop (v. 5 for 32-bit x86) enabled: 6,325
rhel-i386-client-supplementary-5 RHEL Desktop Supplementary (v. 5 for 32-bit x86) enabled: 544
rhn-tools-rhel-i386-client-5 Red Hat Network Tools for RHEL Client (v.5 32-bit x86) enabled: 428