You'll need a fairly small photograph. Upload it to a pix hosting site. A FREE one is http://s37.photobucket.com/ where you can create an account. ** Once it is uploaded, then copy the "direct link" and paste it into the pix link spot under your options where you can create your avatar.
**(if you can't create one for some reason, let me know via private message, along with the pix you want to use, and I'll upload it to mine and give you the link so you can use your pix)