When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Just like you uploaded your current sig. Click on the link Matthew provided, drag that picture to your desktop, then which ever photo uploader you use (photobucket, stuff like that) upload that pic there, then get the [img] code and out that in code in your sig.