I suggest you either add kde3 (very stable, rock solid)
In software management, filter by patterns and select kde3-base and kde3-desktop
you then have to logout and at the login screen, lower left corner, select kde3
you need auto login disabled
http://forums.opensuse.org/how-faq-r...uto-login.html
or be a little adventurous and add the 4.2 repo's
KDE4.2.* (How To Add) Guide. - openSUSE Forums