Customized TOC button

I want to hide the TOC button in the PlayBar but also be able to open (Show) the TOC using the "Show TOC" Action attached to a custom button in the header of my template.

In the skin editor, when I uncheck the "Show TOC" option, the custom button with the Advanced Action will not work.

When I select the checkbox to Show TOC, the Advanced Action on the custom button DOES work, but the TOC button also displays in the PlayBar.

Is there an EASY workaround that doesn't involve using Flash to modify the control?