Doubt about loading an external SWF

i have this weird doubt.
i am making a website that has all the buttons scattered around because its like a pict of a park. and i am using this script to load an external SWF to an empty MC


but the doubt is, if this MC is on a layer on top of all the layers, when it uploads the swf i can still click the buttons on the backround, is there a way to avoid this?
is there some sort of property that makes the buttons unavaible? or is there a better way to desactivate the other buttons?