I've seen that the ToolStripButton shows disabled borders, rendered through ad-hoc stretched images (defined within the skin/theme, i.e. at .../ToolStrip/button/button_Disabled_stretch.png)

Now, within the same application I'd like to have some ToolStripButton instances that shows the border when disabled, while others that don't show the borders.
So: how can I obtain the desired behavior if the border directly comes from the skin?

I'm working with Smartgwt 3.0p LGPL with a custom skin derived from Enterprise theme.