okie, haven't seen one / used one tbh, however the issue of getting to the router still seems apparent, so at least he can find the address it's using by the ipconfig, will a least confirm if it has changed in anyway.
In fact I think the netgear routers use this method for setting changes... real pain in the rear when config changing and messing about with, how many times must I log in .... Oh that'l be every change then ho humm great idea or what ! At least with the likes of others you can apply them test and then continue to change as needed.