Sorry, never used mepis. I have no clue what custom configure util it uses. To start with it may be a good idea to see if your network controller is recognized. Do this as root: "ifconfig -a". You should see "eth0" on the left along with "lo" and maybe a few others. If you do not see "eth0" then you need to install some drivers for your network card (load some modules / recompile kernel). To see what network card you have, you can type "lspci" or "cat /proc/pci" and look for a netowork controller in the list. If you do see "eth0", then I can't help you with the rest of the setup. For some silly reason, most distros have their own custom configuration utilities instead of using the standard "ifconfig", "route", etc.