Stop buttons while mc playing

hi i have a number of buttons in a flash movie that show different photos. It’s pretty simple (you can see it here: http://www.oliperphonic.com/tst-page.html)

The problem i have is that if you click one button then impatiently click the next one it won’t work as the mc is still playing and kind of gives the impression that you have to click the button twice. Is there anyway to stop the buttons from working while the clip is playing out?

Another question but not so important is: You’ll notice how if you click the pics from the bottom up the previous little button fades back in and the new photo shows. However if you don’t go in order from bottom to top the wrong pic fades back in (should be the last one you were on). Is there a simple way of making this so? Just some ideas would be great, i’m a bit of a flash simpleton i’m afraid.

Many thanks for any help