Movie clip button Help

Hi,
I have a movie clip button that has 4 states:
up, over, out, press, and disable.
the action script inside the movie clip button looks like this:

stop();
onRollOver = function () {
this.gotoAndstop("_over");
};
onRollOut = function () {
this.gotoAndstop("_out");
};
onPress = function () {
this.gotoAndstop("_press");
};

on the stage, I have several instances of this button mc.
when the button is clicked, it loads an external file into a container on the stage.

the action script looks like this.

myButtonMC_1.onRelease = function() {
_root.holder1.loadMovie(“Image_1.swf”);
};
myButtonMC_2.onRelease = function() {
_root.holder1.loadMovie(“Image_2.swf”);
};
myButtonMC_3.onRelease = function() {
_root.holder1.loadMovie(“Image_3.swf”);
};

and so on.

Now what I am trying to do, is after let’s say, myButtonMC_1 is clicked, it becomes disabled and the hand cursor disappears.

when myButtonMC_2 is then clicked, I want myButtonMC_1 to become enabled,
and myButtonMC_2 to become disabled etc.

I am having problems doing this.
this is an example of the actionScript on the main stage.

myButtonMC_1.onRelease = function() {
_root.holder1.loadMovie(“Image_1.swf”);
this.gotoAndstop("_disable");
this.enabled = false;
this.useHandCurser = false;
};

Can someone please help me?

Thank you in advance, I really appreciate it.

mk