upgrade from .9 to latest

Would like to upgrade from .9 to latest build; what is recommended upgrade procedure? I have successfully built a new server (on another box) but can find no docs outlining upgrade procedure, especially such a large step. Is it possible to upgrade, or do I build a build another server on the same box? -- Regards, Andrew Long Network Support Specialist EscapeWire Solutions, LLC 617 Dingens Street Buffalo, NY 14206 Office: (716) 893-4984 Mobile: (716) 830-5169 Fax: (716) 891-4288 Web: http://www.escapewire.com E-mail: along@escapewire.com