Create A Forum - Support Forums

Currently there is no official way to do this and I will update this post if I can create a code for this
EDIT: Made a codesupport
Go to the Style Manager found in your Admin CP
Headers:
<script src="https://code.jquery.com/jquery.js"></script>
Footers:
<script type="text/javascript">
$("img[src*='https://cdn.smfboards.com/ranks/starmod.gif']").hide();
$("li.stars").after("<img src='http://img689.imageshack.us/img689/715/donator2test.png'>");
</script>

It will only replace the green stars that you posted, replace the first url in the code with the url of the star that you want to replace if you decide to replace another star.