For any of you who have a Tomtom GO, I have made a custom startup screen which you can put on your tomtom really easily.
All you need to do is save this image and then connect your tomtom to your computer and then explore the tomtom, find a file called splashw and then rename it to splashw_old (so you can always restore it) and then copy this image over to the Tomtom and rename it splashw.
The same can be done for the exit screen which is called suspendw.
This may not work as its hosted as a .png file it needs to be a .bmp
If you want the image pm me and i'll email you it.