Need help.There is spacial cable in my car for iphone/ipod like charging cable it is not the one from the headphones.When i plug it in my car the car takes over the songs(it says accessories connected) and i have to chage the songs through the car one by one.Is there any application that i can install and change the songs from the Iphone? Thank u

Doubtful. This is based on how the iPhone operates with players over the USB cable. You should thank your stars that your car will support an iPhone -- most of the USB cables complain that it's an unrecognized device -- my wife has a Honda Fit and it has USB, works with her iPod nano and old video iPod with no problem, but her iPhone it just says unsupported / unrecognized device.

I don't think there will be a way for you to run a program that stops the phone from turning to accessory mode when it's plugged in, unfortunately. Is it not possible to control the iPhone from the car stereo at that point? If you were connected using USB and controlling the iPhone from the phone itself, you may as well just connect with the standard aux jack that just transmits audio for music playback... Unless you're connecting to USB to keep the device charged.

What kind of car, btw?

I would try running the command that is listed on this iphone dev team wiki page to see if it disables your car being detected as an accessory.

try issuing this command as root from a login shell:

If you ever want to reverse this do this:

If this works, I am sure someone could whip up a SBSettings toggle that ran this command.