Want to change some emblems

[Tyrannocaster]

I would like to add or at least change some emblems (found under the file's Properties). I just discovered these, which seem to function like the labels I used to use when I used a Mac. I set up my mp3s with a few different labels on the Mac, so I started going through the emblems in LL to do something similar. I need to get an emblem that says "don't like" or something similar. At the moment, all I can find that works well visually is the the red exclamation point for "Important", and that works, but it seems kludgy.

How do you customize these? Can I change an emblem's text? The graphic?

Thanks?