Sorry to misunderstand.
If you want to set the current and [/i]active[/i] states so that the menu item for the page you're on is a different from the others, then it is supposed to be done from the Type and Design tabs of the CSSMenuWriter GUI.
It seems easy enough to set these states for background-colour, but I have never managed to get it to 'take' for the text active/current colour, which I have to adjust in the menu.css stylesheet.
This is and example of that.
If that's still not what you mean, then can you provide a link to a page where you've seen what you want?