A couple of hours ago i tweeted that i love to pimp my pdfToolbox. And here is how i did it.
Callas uses a set of files to display the available profiles in the Switchboard. The set contains a XML file a PNG file and the ICC profile itself. To use your custom made icon you just have to adapt the .png file located in:
/Users/~/Library/Preferences/callas software/callas pdfToolbox 5.5/DeviceLink
make sure you don´t change the name of the png file when saving the edited image.
I know that´s not something that boosts your productivity but i love eye candy ;-)