open gimp
make a 200x200 new image
make it whatever you want, make the background transparent
save it as a png
upload to photobucket
make a custom rank for you in the admin panel
copy the "direct link" link to the "rank pic" form in the rank panel
click ok
apply the rank to you
and it should be ok..
if you want you can make yours, and ill put it on for you.