Button trigers hover state of another button

Hi there,

I have 2 questions:
1/ I have sub-navigation section (MC) with buttons. When I go to the sub-navigation MC I want one of the buttons (the default one) to be on it’s hover state.
2/ When I mouse over the buttons I don’t want the last visited button (rollovered) to turn back in it’s normal state. In other words - I need at least one hover state button on the given MC.

Thanks in advance for your help!

P.S. I work in Flash