Yeah, as I said at the beginning of the post - I've realised the routers not compatible. The way I see it is I either buy an all in one router with builtin adsl modem, or I buy an ethernet adsl modem to plug into the router. One of the reasons for this was because the PC with the shared internet connection is being moved into a different room. Although it would have been nice to leave my pc off, I think I'll just get a longer crossover cable for a fraction of the price!
Cheers, Steve.