You could actually try helping him Slateon, rather than just posting senseless sarcasm.
To insert images into your signature do this;
1. First upload the image to www.imageshack.us
to get a URL for the image.
2. Go to edit signature in the User-CP and put the URL between two image tags which look like this: [IMG*]URL of Image here
[/IMG*] Remove the *'s.
Alternatively, click the button which looks like this:
and paste the URL into the box which appears.
EDIT: Damn, I was too slow. =P