On Fri, 25 Jan 2008 03:43:57 +0000, Eeyore
wrote:

Some car radios are built into the dash (into the car's SYSTEM even) are all but
totally unreplacable !

It's a rare car that won't accept a standard radio in the same slot as
the original, maybe with an adapter plate. You might even be
pleasantly surprised how many remote control functions still work -
today's standard connecter is a complex beast! Google "ISO 10487" if
you're interested.