How to install Vista when I already have XP?

[thirucumaran]

hey i want to know how to uninstall vista when i also have xp?

also, do I have to install all the programs again for vista?? will these programs that i install for vista get uninstalled when i uninstall vista?? can anyone pls help out

cos this is my sister's computer and she has given me only 10 days to try out vista and uninstall it! so pls help anyone!:( :( :(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:( :(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(:(

[chaminga_d]

1. Your first step will be to modify the Windows XP system partition to make space for Vista. (You Have to Install Vista into a Different Partition Used for Windows XP)
2. Restart the system and boot from the Vista DVD.
Work your way through the Vista install screens until you get to "Which type of Installation do you want?"
3. As this is not an upgrade install, select Custom install.
4. Select New Partition that not Used for XP
The Vista boot manager will take over the system completely, and Windows XP effectively loads via Vista. It’s all pretty seamless though, and you shouldn’t encounter any technical problems.
5. Once Vista is installed and the system reboots, you’ll be presented with a boot menu with two options: “Microsoft Windows Vista” and “An Earlier Version of Windows”.