You can't do that on 32bit OS...you must have 64bit Windows OSs such as Windows XP x64 edition, Windows Server 2003 x64 edition and Vista x64 or Windows Server 2008 x64 I run Vlite on WinXP Pro SP3, and i do slipstream Vista SP1 on it, it`s running normaly no error inside,only vlite warn me if run vlite on windows XP 32 bit may will make my computer crash, but no error appear. everything run normally and my vista DVD now become Vista SP1 succesfully. Thank`s neo for your tutorial, great job ..!! sorry about my english, i`m Indonesian..