Thank so much you for all your help! I played around with HoodReplace and my game didn't implode :D Although unfortunately I have an older version of simcity4 which doesn't load the Strangetown terrain (the MTS thread says the terrain was made with the later Rush Hour version and that's the reason behind it).

The rest of my neighbourhoods are at the mercy of my new road giving powers though ;)

Ooh, and the Fort looks awesome in my game!