It's not impossible...


1. Upload your custom avatar pic to an image hosting site (like TinyPic for example)

2. You'll get a direct link (and some others) to the image once you upload it- copy the direct link.

3. On MKO, click on "Settings" in the upper left side and then on "Change Icon" and paste the direct link from TinyPic into the white box and click "OK".

4. Finally click "Save Settings".



Btw, these kind of questions are better suited for the General Discussion section of the forums.

EDIT: Oh and all avatars are 75x75 max size (if your image is bigger, it'll be scaled down proportionally).