OK, one mystery solved. The text settings for the Toolbar titles on the taskbar are found in the left tree under Taskbar>Taskbar Gripper>Horizontal. It was bugging me as some really great skins (eg MikeB314's StealthOS) with dark taskbars leave this attribute untouched so it winds up with black text and nearly unreadable if you use toolbars on the taskbar.
I realize this doesn't help you much pict, but it does at least answer a question brought up in this thread.
I'm still trying to find the correct answer to your original question.