IE7 CSS problems

[Boofo]

The following is not working in IE7. In IE8 and Opera it is centered on the page. In IE7 it is aligned to the left. I know IE7 doesn't recognize display:table. How can I get this centered foir IE7 and have it still work for IE8 and Opera?

I am using it as <ul id="sitemap">, if that helps.

#sitemap {
	display:table;
	padding:0;
	margin:0 auto;
	color:#fff;
	font-family: arial, helvetica, sans-serif;
	white-space:nowrap;
	list-style-type:none;
}