So I got Media Center, however I can't get rollup2 to install. I can get other things like sp2 and other minor updates to install. Help please?

If you bought it retail i can give you a link to get to microsoft support it will take about 24 hours to get a response, if it cane preinstalled in youe computer contact the manufacturer.
If you need the link send me a mail.
However you can try this: http://blogs.msdn.com/astebner/archive/2006/05/22/how-to-manually-install-the-various-pieces-of-update-rollup-2-for-media-center-2005.aspx