Hi,
I think that the mini CD did not install KDE.
You have 2 options:
1 - Install all kde packages by hand
You may want to configure your urpmi repositories. If you don't know how to do this you can try googling "easy urpmi" and if you can't get it working post again here.
After you have urpmi set up you should go to the official KDE website and download the rpm packages for Mandrake. They are located at
http://www.kde.org/download/
Read this post to learn how to install kde:
http://www.linuxquestions.org/questi...hreadid=347652
or
2 - Download the 3 ISO Images and install the full system with KDE
By the way, I don't recomend compiling stuff from source. This will prevent the rpm dependency checker (and thus urpmi) from working at it's best. I recomend installing the rpm packages.
I usually just compile the kernel for a faster system.