Damian, could you see the pic? If you right click and Select COPY, your PC takes a snapshot of the PIC you are right clicking... don't choose save. Like I found all the sig-pics I liked, that apply to me, right clicked, selected COPY, then PASTED them onto a blank windows paintbrush screen, zoomed in, modified them to fit the way I like, lined them all up, drew a black frame around them and saved the pic onn my desktop as my signature-pic.jpg.
Posted it once in a REPLY screen (the little paper-clip) and then right clicked in the resulting thread for the new address. Added that address in my signature block, and walla... (sorry if that was long winded, just thought it might help someone else if you already got it)