Create the image you want in, say, Photoshop or Paint Shop Pro, don't make it larger than 500x125 pixels. Save it as a .jpg or .gif, and upload it to an image hosting site, or here:

http://www.zelaron.com/forum/profile...editprofilepic

Then put the image in your signature:

http://www.zelaron.com/forum/profile...=editsignature

"Stephen Wolfram is the creator of Mathematica and is widely regarded as the most important innovator in scientific and technical computing today." - Stephen Wolfram