For the mosaic thingy, just follow these instructions:
1. Go to this link:
[link]
2. Click on the link that's on "Work on a Panel of this Mosaic by clicking here"
3. Click on the "Get my panel" button.
4. You will see a blue square.
5. Save it to your hard disk, but do not rename it.
6. You can either draw or simply paste your icon on the saved picture. But do not draw beyond the square.
7. To submit, click here:
[link]
8. If it's ok, you should see a message that says your panel has been added successfully.