I used the kde-iso to get KDE in stead of the default Gnome.
With the 2nd install (same iso) I chose network install after installation of base-system.
Wonderfull, got a nice KDE-desktop :-)
Only had to change the video-driver from nv to vesa.
My GeForce 6200 TurboCache can't handle this driver.
Have to install the NVidia driver; not with apt-get install
Anyhow: it seems that the KDE-install CD is buggy