I thank you folks. On reflection, I figured out how to find the original post and answer. The topic was "Change hostname PCLinuxOS" on June 21, 2011, 6:56:59 PM.
Texstar answered, and mentioned two files to change: /etc/sysconfig/network and /etc/hosts.
Someone also mentioned that you shouldn't use uppercase, but I did anyway--I'll see if that creates a problem.