How do I uninstall windows vista

I'm new to Mac, and i installed Windows vista on my laptop but now its not working very good,,so i want to uninstall it and install XP instead..How do i Do that?
Thanks in advance

 

So you installed Vista within Parallels? If so and you have no data in your Vista image that you need then navigate to ~/Library/Parallels (the ~ means the Library directory wihin your user directory) and delete the folder your installed Vista in and then just create a new image in Parallels for XP.

 

i just did that and installed xp..hope it works alot better than Vista..thanks alot

 

It wil but the VM will need the same good house keeping as any other Windows machine

anti virus
firewall
security etc etc

Using Parallels since June 2006 and it just keeps on truckin'

even the beta(s) if you treat it with respect
proper shut downs and (virtual) disk maintenance utilities

Hugh W