Okay... this might seem a little complicated, but it was the only way i could get an avatar by my name. Go to google and type in "anime avatars". look for the link that says MSN anime avatar display pack free download( it's on the 2nd or 3rd page)go through the process of downloading the display, then download the anime images. they will show up in whatever file you put them in as jpeg files. once you find the one you want, you'll need to change the pixel size so that it will fit. do that by clicking on image in the toolbar and go down to resize. change the unit to pixels and lower the height and width to 80. then just come back here and go to edit avatar and select browse to upload it from your computer.
Whew! sorry it's so complicated, but if I could do it(I obviously don't know a lot about computers) Then you should be albe to as well. of course, if someone has an easier way, then by all means, listen to them! hope I was of some hlep!