Customiseable car interiors

[GtaSeriesFan]

Hello, I have an idea of customizing vehicles interiors. The idea came when i saw the BMW M3 GTR (race version) from NFS Most Wanted and NFS Carbon - it only had the driver's seat, while others are scrapped completely, also car had pipe system and some sort of rollcage (i know rollcage is allready in game). So that is it, I'm talking about possibility of changing car's steering wheels, giving inside neons and deleting car's seats to reduce weight. Offcourse it can be hard and probadly it will not happen soon. Thank you.