if you have the picture on a website you need the direct address from that website, i use photobucket its free and you can upload your pictures on there and it gives you the addresses you need to be able to copy and paste. you'll want to go and edit your profile and in the signature box is where you paste it. hopefully that helps
tinypic.com is what I use. Download your photo to that and use the email size option. Then copy and paste the html:..... thingy. (I don't know computer lingo.) Paste it in your profile where your siggys go.
Re: Two silly bump-techie questions!