What sort of changes do you want?
If you have an image to cover it:
Code:
<style type="text/css">
i.bar{background:url(IMAGE URL);height:IMAGE HEIGHT;width:IMAGE WIDTH;position:absolute;top:0;left:0}
</style>
<i class="bar"> </i>
If you put the image url, height and width in the appropriate places, your image will cover the top bar, including the stats up there.
Code:
<style type="text/css">table{background:none}</style>
That should remove the top part completely (and your background should be visible) and keep the text.
If this isn't what you wanted to change,
http://home.neopets.com/templates/homepage.phtml?pet_name=csshelp should be able to help.