Hi,
You don't. You need to wait for the next public release (probably RC1 in
another month or so). Those with MSDN subscriptions will have access to some
of the interim releases in addition to the public ones. If you work for a
company that has one, you might check to see if you can obtain the interim
builds this way.
--
Best of Luck,
Rick Rogers, aka "Nutcase" - Microsoft MVP
Windows help -
www.rickrogers.org