Something like this may help you, even though it is far from perfect.
Code:
<script type="text/javascript">
jQuery(document).ready(function(){
jQuery('#fadeshow1').css({
'width':'90%',
'height':'800px'
});
jQuery('.gallerylayer img').css({
'width':'100%',
'height':'auto'
});
});
</script>
You can see a demonstration here
Of course it would look better with images of a higher resolution
Alright i see it looks a little buggy in internet explorer ( surprise) , but anyway it could be a starting point in some way.
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