Mandrake? I'm not sure about graphical (I have a tendancy to be old skool, command line), however, if you open a terminal, then use the command 'su' to become root (giving your root password (if you already are root, I may have to smack you over the head for running as root)), then type in dh (hit tab 2x now). There should be one or two entries that come up, dhcpd and/or dhclient. Use the coomand dhclient as is, or dhcpd eth0, or if you can manage to install it, there's a nifty tool called pump that's an all in one command, however I hear it's being phased out (design limitations)