Looks good to me!
You can change the sig in the Profile section where it says Signature (right underneath Date of Birth). That's where you put the img tag or your signature text. But then if you want your sig to appear on a post, you need to make sure you check the box that says "Attach signature (signatures can be changed in profile)" (which is underneath Disable Smiles in this post). If you do a Quick Reply though you won't see the option- you have to click on the "Post Reply" button to see the option. You'll also see the option when you make a new thread.