DVD Studio Pro techniques (now: changing text based on button highlight)

[ono]

Okay, so I've never had a class on DVD Studio or anything like that, and have basically just gotten by with doing searches and whatnot.  My gear: DVD Studio Pro 3, Gimp 2.6.  I'm trying to create a DVD in which there's a series of buttons and a box or hot area of text (a graphic, maybe) that changes based on what button is currently highlighted.  I've searched around to no avail, so I'm wondering if there's anyone who's great at that type of thing who could help me or point me in the right direction.  Thanks!