No need mate - just highlight the URL I gave you, copy it, and paste it into your signature in your PROFILE (top of page)

If you do want to save it, right click it, select save as, choose your subject name, then below where you type that, you can select what format you want to save it as. If you can only select .bmp, save it as that, then open it up in MS Paint, select save as then change the file type