HELP transition button down states

programming flash
1

After completing the external swf transition tutorial the site is working great except for the fact I can’t figure out how to lock the movie clip buttons in their down states until another button is pressed.
Here is the code I have on my first button:-

stop();

this.onEnterFrame = function(){
if(rewind == true){
prevFrame();
}
}

this.onRollOver = function(){
rewind = false;
play();
}

this.onRelease = function(){
rewind = true;
}

this.onRelease = function(){
if (_root.currMovie == undefined) {
_root.currMovie = “about”;
_root.container.loadMovie(“about.swf”);
} else if (_root.currMovie != “about”) {
if (_root.container._currentframe >= _root.container.midframe) {
_root.currMovie = “about”;
_root.container.play();

    }
}

}

Any help appreciated!