KDE and Gnome

Is there any way to switch between KDE and Gnome Desktops, I seem to
like KDE better, however I selected Gnome because I am more familiar
with it when I installed.

I am running RH 7.3 and presently I can run KDE apps within Gnome, but
I would also like to have the full KDE desktop without Gnome.

TIA

FrankM