You're welcome
That's the Glacier Silver I like the most
Here's a quick reference link for you to help upload an signature picture as well
http://g30.bimmerpost.com/forums/showthread.php?t=3031
Or
Click on User CP , at the left pane you will see Options List . Click on the Edit Signature Button , you will be redirected to a new page , just scroll down the page to see Insert Signature Picture Window .
Now, all you have to do is to pick an image from either on the internet or from your computer .
However, you're a new member I don't know whether you would be eligible to have a signature image yet or not