Change my Signature to an image?

Can I change my signature from this:
BUY Monkey Boy #2 here: http://indyplanet.com/store/product_info.php?products_id=7337
BUY Monkey Boy #1 here: http://indyplanet.com/store/product_info.php?products_id=6416
Monkey Boy Merchandise: http://www.cafepress.com/needhamcomics
Check out Monkey Boy at Comicvine: http://www.comicvine.com/comic-vine-mail-bag-112310/112-1342/
Artistsean's Deviantart.com page: http://artistneedham.deviantart.com/

to this:


and maybe add these links:
BUY Monkey Boy #2 here: http://indyplanet.com/store/product_info.php?products_id=7337
BUY Monkey Boy #1 here: http://indyplanet.com/store/product_info.php?products_id=6416