Application's title renaming

Hello!

I've downloaded and I'm using a program: wmdrawer. Homepage:
http://people.easter-eggs.org/~valos/wmdrawer/
Ok, I know that is a very old program.
So, this program run at startx in three instances: some application,
mpd control and volume control. They are in separate frames. But the
titles are long so it doesn't look fine (see attachment).
Can I rename the titles (e.g. to mpd and volume and apps)?

Thanks!
 Zsolt