Here are three ways you could do it.
(The last one is probably the one you want): (FreeTranslation.com: Le dernier l'un est probablement l'un vous voulez)

1.You can do it manually by putting all the links in yourself.
eg. My Account: http://www.neopets.com/myaccount.phtml
Pet Central: http://www.neopets.com/petcentral.phtml
etc.

Or:
2. You can put a different image in the header area.
eg.
<style>
#header {background: #000000 url(http://www.mezimages.com/membres/07/86393-ava1infopouet.png);position: absolute;left:0px;top:0px;height:100px;width:100px}

Or:
3.(Probably the best choice)
Moving the navigation bar around wherever you want:

<style>
#navigation{position:absolute;top:100px;left:100px}
</style>

Hope that made sense.

(Je m'excuse de mon français)