Favicon, you mean? Upload a 16x16 or 32x32 image named 'favicon.ico' to root directory of MyBB installation. Also, your site gives me a 403 error.
acp > templates > your theme's template > headerinclude > add this code at the top:
<link rel="icon" type="image/png" href="http://horryboshlings.x10host.com/favicon.ico.png">