Router suckterfuge

Got an SMC7004AWBR 4-port Wireless Broadband Router. It’s broken. It works, except that there’s no way to get to the main configuration screen. All the other navigator links work; I can set up firewall options, define a DMZ machine, and so on. I just can’t actually tell it my ISP or anything useful like that. I can plug it into my existing router and use it as a wireless access point, or alternatively it’ll do as a doorstop.