Has anyone had luck installing MRTG on their box? I can install it, and everything fine.. but configuring it is where i'm lost. It asks for some router information, where would we get this?

Any help anyone can offer would be appreciated.

Thanks!

really, have problem like this - I dont know router's info.
Can anybody help us?

You can get the bandwidth statistics from a SNMP switch. In order to discover the switch you may run a SNMP discovery, but I doubt that your provider will let you gather these stats.
Insted, you can install a script that take the stats from the ethernet interface.