[Gabbina]

I'm not sure I can help at all... but for what I know, with snow Leopard they took away the explicit "archive and install" option because it will mix your new system files with the old with no problem... the "upgrade" option is based on that old "archive and install" option. I know there's a way to do it anyway, but have no clue... I'll see if I can find another tutorial somewhere.