I recently looked at a friends rooted Android device, with a legal Tomtom installed on it, and Speedcams and Warnings Services activated.

With Rootexplorer I couldn't find any files or data containing speedcamscams, warnings or sound.
Some files were addes or changed in 'shared_prefs', but I couldn't find cams.
Old fashioned *.ov2 and *.bmp files are working, if desired.

What should I have looked for?

Is there a way to copy it?