Step 1) Setting up openSUSE 11.0
I won't go into great detail on installing as the installer should get you through the steps easy enough.
Basically stick to the install defaults and I would recommend using the install DVD so you have all the needed packages at hand. Get that here : http://software.opensuse.org
Note on DE choice: I use GNOME as my window manager, but this is not really relevant as this is a monitoring system and it's cleaner to run it in console mode to keep a small footprint.
openSUSE Install guidelines & considerations: