[CentOS] Default CentOS 4 desktop

Mon Apr 4 11:54:51 UTC 2005
Chris Hammond <chris at tac.esi.net>

Simple question that I appear to be missing the answer to, how do I 
specify the default desktop?
I know I am probably going to kick myself when I find out but the guy I 
work with and I just can't
seem to find it. :(