HELP PLEASE

I have built an external movie clip loader using movie clip buttons which all works however I can't work out how to keep the button in the 'down' state for the relevant loaded movie until another button is pressed.Here is the code on the 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!!