[Plugin: WP-prettyPhoto] Is there a way to move the close button to the top-right?

Is there a way to move the close button to the top-right? I tried to change the mark-up, but just broke it. I can add negative margins to the close css (in prettyPhoto.css) like so:
div.facebook .pp_close{width:22px;height:22px; margin-right:-10px; margin-top:-380px; background: url(../images/prettyPhoto/facebook/sprite.png) -1px -1px no-repeat;
..but this only works properly if the final image/movie is the right height. (the above example works for standard youtube vids for example)