SuSE 10.0 and Gnome

Hi, I've installed SuSE 10.0 on intel hardware with the defaults. So, I have KDE. I'd like to try Gnome, but I can't figure out how to log into it as a desktop. On my logon screen, it is not one of the choices for an environment. Shouldn't the default install have put it there? If not, how can I install it and try it out? tia, Matt