[wp-hackers] add_menu_page, icon, dynamic menu, css and plugin

[Aaron D. Campbell]

I did something very similar recently, here's how I did it:
First, I set $this->_file in my class to the file for the main menu 
item, then I do this:

add_menu_page( __('Page Title'), __('Menu Title'), 'accessLevel', 
$this->_file, '', 'div');

...

public function adminCSS() {
    echo <<<CSS
    <style type="text/css">
        #toplevel_page_{$this->_file} .wp-menu-image {
            background:transparent url(images/menu.png) no-repeat scroll 
-1px -1px;
        }
    </style>
CSS;
}

...

add_action( "admin_print_scripts", array($this, 'adminCSS') );

That should take care of it.