[BR3W CITY]

FYI, a really nice "oldschool" cheat for this existed well before the remote-hideaway stereo's that some of the resto places sell.

In home theatre and home studio, there is something called an IR Repeater. Its simply a little box which can use a place-anyhwere "eye" to transmit a wired signal to another "eye" which passes the signal to the radio, placed anywere. We've used them to fully hide radios (pretty much without access), and control them via the include remote (provided its infra red)