I figured out how to add a pict for my avatar.. but How do I put a pict for my sig? I tried the URL and it just links, doesn't show the actual picture...
I like to resize them on my PC first using a photo editing program and then upload them onto TinyPic for hosting. I'd aim for a height of 180 pixels or less.
If you use photobucket, it lets you resize a photo on their site and save the resized version as a separate photo. That's what I did. Of course I accidentally used the full size version at first, so for about ten seconds last night, my siggy pic took up the entire screen. lol.
ETA: For reference, my siggy photo is 200 wide by 150 high.