Routing table headaches

This is going to sound very newbyish, but I'm still a bit green when it comes to Linux networking. I'm using Roaring Penguin PPPoE with Knoppix, and I need to set up my routing table. Can anyone tell me how to do this? thanks

Output of netstat -n -r
Kernel IP routing table
Destination Gateway Genmask Flags MSS Window irtt Iface
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Alex C-G

Have you been here? http://www.roaringpenguin.com/pppoe/tkpppoe/

Tried that, but it offers no place to set IP addresses, gateway masks, that kinda thing. I tried linuxconf too, but it still doesn't show up in the log output. Thanks anyway