Yum not workingon Fedora Constantine

Downloaded the new Fedora 12 and had issues using yum..

Here is the fix

*Edit two of your repository files: /etc/yum.repos.d/fedora.repo and /etc/yum.repos.d/fedora-updates.repo.
*Un-comment all the lines that start with the term baseurl and place a comment before all lines that start with mirrorlist. .

* Edit your /etc/hosts file and append the following to it’s contents:

80.239.156.215 mirrors.fedoraproject.org
213.129.242.84 mirrors.rpmfusion.org