Load and unload external.swf in AS3

OK this should be the last of the coding to complete my AS2 to AS3 conversion of a site. The AS2 site had an external photogallery .swf that loaded from a navigation button on the main timeline. It used the loadMovie function so it loaded a photogallery on top of the main .swf in level one.

I also had unloadMovie,1 in all the navigation buttons so if a user was in the gallery and they clicked anywhere else in the main .swf which is all in level 0 the gallery in level 1 would be deleted.

In this situation the gallery that will be loaded on top of the main.swf needs to be a little smaller than the main ,swf so the navigation on the top of the main shows through. If the main.swf is 900 x 600 I would need to load the photogallery on top which would be 900 x 450 and need to use x and y coordinates so when the swf loads it loads in the right spot.

any help with this ??

RD