This is probably to late for you, but for future referenece: Most routers have the capability to modify the LAN addresses in their configuration settings. When I get a new router, I will go in and set the LAN addresses to what my old router used. For example, if my old router used "192.168.0.xx" and the new router defaults to "192.168.1.xx", I just change the new router to use "192.168.0.xx" instead.
Sadly this new router doesn't.... so new subnet and it made a complete mess of my home network. Still finding things which need fixing.
