Step by step:
type: urpmq --list-media
Note the install media (probably something like dvd or cd1)
Log in as root and type: urpmi.removemedia <install media>
Still logged in as root type: urpmi.addmedia contrib ftp://ftp.nluug.nl/pub/os/Linux/distr/Man...6/media/contrib with media_info/hdlist.cz
and type: urpmi.addmedia main ftp://ftp.nluug.nl/pub/os/Linux/distr/Man...i586/media/main with media_info/hdlist.cz
and type: urpmi.addmedia --update updates ftp://ftp.nluug.nl/pub/os/Linux/distr/Man...0/main_updates/ with media_info/hdlist.cz
Now type: urpmi libxorg-X11
Type: urpmi icewm (a basic window manager)
Type: mcc (for mandriva control center) and configure your videocard.
Log out as root (by typing exit) and type: startx icewm
Make sure your favorite DE (Gnome or KDE or whatever) is installed, log out of icewm by clicking start, logout
and type: startx startkde (for example)