Forums Scripts & Popups add tool buttons?

I know that I can change the icons of the tull buttons by:

toolbuttons=picture.bmp


Is there a way to add another icon (and leave the other like they are), or use a picure.bmp which has the icon of the nuew button I wanna add, and then tell mIRC to add a new button to the took buttons and also tell it what to execture?

10x

you can make an MDX toolbar but you can remove or change an icons

But how can I add one?