Actually I just posted that to the other thread regarding switchdesk, before I saw this one.
rpm -ql switchdesk
copy the .Xclients.kde file to ~/.Xclients-default.
And, if you'd like to change the default for all users on the system, in case you create new ones....
$-> cat /etc/sysconfig/desktop
change to "KDE"
- Andrew <email@example.com>
No one now has, and no one will ever again get, the big picture. - Daniel Geer