your idea arnt dumb
just a little under devloped which is expected
the whole thing with the cam interest me...
bug? how do you overcome bug protection?
now for a switch between the cam and the computer... there are a few ways around it
Get a tv/in card and just have it show up in your computer (Pimp) rig up some sort of switch and use that (ghetto)
Switching between the cd player and computer is a no brianer. just use your head unit... Since its a stock unit (you should do something about that holmes) an Fm modulator would be the best soluntion if your attachted to the unit (I wouldnt be)
The answers are there grasshopper it just takes a little grey matter to figure out the question.... (meaning the answers are there you just have to think about it)