You can do it with MS Paint, if you have to Open the picture you want for an avatar, and then click on Image--->Stretch/Skew. Just put in a smaller percentange for the stretch (make sure they're both the same or your picture will look weird) until it's a size allowed (sizes are 75x75 pixels, I forget the file size). It's not very acurate that way, and will take a lot of tweaking, but it works. Or if you want, I can do it for you (I have Photoshop) and with Photoshop I can do it accurately.