Did you get the AUX cable too or just the iPod one in the end? If you've got the aux one, just get a cable to go from the 3.5mm stereo jack on the TomTom to the red and white cables - that's how my Bluetouch is hooked up to my grom unit..........works perfectly :)
Yes mate, got both cables.
Can you point me in the direction of this cable? Also, are you sure your TT has a 20gb storage capacity for MP3's? The latest one only has 4gb?