<A target="_blank" href="http://notesbusters.com/2010/07/19/upgrading-domino-32-bit-to-64-bit-2/">Victor Toal has posted the basic steps to take to upgrade your server to 64-bit Domino.</A> Method 1 - have a second server available. Method 2 - have lots of time, antacids, and other mojo available before you start.