Quote Originally Posted by c123
3. how can I change window mangager, are others already installed or do I have to install them?
I'm so dense at times it even amazes me! KDM (the K Display Manager) allows this. From the shell I type KDM (or have it start automatically when I pass to run level 5) and then at the bottom there's a list box that allows you to choose the window manager... It's that simple.

BTW half a dozen WMs (at least) seem to be installed already.