simple tweens on the buttons (of course, can be done in A/S), with easing set to 100. The rest is the equivalent to swapping images on rollover. Make one faded (_alpha to 45 or whatever you like), make another with _alpha to 100. On rollover you play the one with 100. On rollout you play the one with 45.
I hope that is a nudge in the right direction. If you get stuck, come back, and we’ll help you some more.
I will try and have a go at it. I still struggle with A/S as i don’t have any kind of a programming backround. The tute was a little bit hard to follow coz it was in broken English. Thanks to all who answered.