I take it the 'toolbar.tcl' is new in V6?
Found similar, but different, code in ac3d.tcl ... still trying to figure out how to alter it. All my efforts so far lock me up ;-)
Is there a list somewhere of all the functions that can be attached to buttons ?
And am I interpreting the code you show correctly:
"TCE..." is the button label
"menu_uveditor" is the function call
"Start AC3D's Texture ..... " is the info bubble ?
griff