With my Tilt and my Motorola T-605 car kit, I have two separate profiles available: one for headset, and the other for music. The music profile is where my TomTom directions are broadcast. Not sure if it's similar on your Parrot kit.

__________________
iPhone 3G ..:.. Jailbroken 16GB Black
AT&T 8925 Tilt ..:.. WM 6.1 ..:.. SIM/CID unlocked
BlackBerry 8830 on Sprint ..:.. crappy work phone