Ok to see if the X5 sees the 32mb card;
Tap
1. Start
2. Settings
3.System
4.Memory
5.Storage Card
6. Where it says "Built-in storage" tap the arrow and tap CF card or SD card.
For the tomtom 3 i think that a 128mb or 256mb SD card ( i do not know a lot about tomtom 3 sorry)
And at last welcome to the Aximsite!!!!!!!!!!!!