Enabling the "Disabled" Card Interfaces?

An Anonymous Coward asks: "Has anyone else noticed how often different versions of what are essentially identical products often differ only in what connections are available on the card? Take for example the GeForce 2 MX... some cards include a TV-Out, others don't. Often, the traces that go to the missing connector are still on the board, only the plug/socket is missing. Has anyone ever tried adding these ports 'after market'? If so, what kind of success rate could one expect, adding something like an MPEG-2 audio connector to their TV tuner, or a DVI port to their Prophet?" An interesting thought, but is soldering on the missing connecter all you need for that extra functionality? Wouldn't firmware changes also be required?