How do i change format for Vista Word processor to 2008 - 07 XP version.?

Is there a why are what - i really looking -How do i change format for Vista Word processor to 2008 - 07 XP version.?All you do is when you go to file%26gt;save as under file name were it says format change it to an older format or the one you want.How do i change format for Vista Word processor to 2008 - 07 XP version.?If you mean how do you make it work for an older version of Microsoft Word, then in the save as options, save it as a word 97-2003 document.