How do you install a radio in your Rover Metro if the wires are different?

You should be able to get a wiring harness from a locally-owned or small business type car audio shop that also does install. Usually the small businesses have better access to get the "odd ball" parts than do Circuit City and Best Buy. If they can't order it, ask one of the guys in the install bay if they know a way to "engineer" something. You would be surprised what they could do!