Ognar

I wanted to set different icons for Firefox and Thunderbird when they are on the taskbar. I know I can change the class icon, however the programs have the same class name (mozillaUIwindow), and therefore always show the same icon. Is there anyway around this? If not within objectdock, is there any app that would let me change a class name? A couple of other things I was wondering (not sure if they relate to my problem though): <br