Customizing toolbar

[Lizardo H . C . M . Nunes]

Hi,

1. I'm creating a toolbar. How can I assign an icon for a command-sequence item
in a toolbar? 

2. How can I create a PopMenu in a toolbar? Is it possible to set an icon for a
PopMenu? How can I assign an icon for a PopMenu? 

Using LyX 1.6.4.1 in Mac OS 10.5

Thank you.