Flash movie size greater than the object tag

I have a scrolling flash gallery. On mouse hover over a thumbnail, a popup with more description is shown. The problem is that my stage height is 200px but the popup requires additional about 200px to show properly. When I embed this in an HTML page with the object tag height set to 200px, i see the scroller completely but the popup get cut from the top. If i change the object height to 400px , it show me the popup fine, but this inserts extra blank space in the html page. Any idea how i can get rid of this problem?