You have to import both the CSS and the webfonts, which means you can't really get this to other users.
this is just something im doing to mess around with my admincp, and the fact that i cant figure it out only makes me want it that much more lol.
im thinking if i add the code to the php file that includes the tables on the left side of the admincp it would work... but i dug in them files looking for <table for a while and couldn't find what i was looking for.
and when i do add it to adminfunctions.php file and view the source, it does load in the source... just icons wont show up in my options =/