Mnaged to find that f/w and flashed it, still had to mess about to get the WAN to light up, tried all combinations of 10/100 full/half duplex but no go! When the WAN lights did come on I couldn't get the router to pickup the IP address from the modem? It picked up the MAC address OK but not the IP, no matter how many times I reset the router and CM.
Flashed 1.52.10 back in and managed to get it up and running again, so 1.45.7 doesn't like me at all