Installing Windows 7 so you duel boot it

Yep so your a windows user. love vista, but you want to try the new upgrade Windows 7.But don't want to complete wipe out your beloved vista. These steps should help you out. So you get to duel boot windows 7 and windows vista!
First download it from here>http://download.microsoft.com/download/6/3/3/633118BD-6C3D-45A4-B985-F0FDFFE1B021/EN/7000.0.081212-1400_client_en-us_Ultimate-GB1CULXFRE_EN_DVD.ISO
Then burn the image to a DVD. its a 3.2GB file so it has to be a DVD. about a 4gb one.
then after you have burned it what you want to do is right click on computer on the vista start menu/xp.
then click on manage. then on the left hand menu click disk management. then on the disk you are wanting to shrink. right click on it and click shrink. then input the amount you want to shrink it by. then they should be a drive that says unused or something.
then restart your computer. With the windows 7 disk still inside. On the restart it will say press any key to boot. so just press any key haha clue in the name i guess. Then it will start to load the windows files. Just be patient. After that has loaded it will come up with the Windows 7 install menu. so click install. then agree to all the terms and stuff it comes up with. then don't click Install!!!!! do not click INSTALL!! click custom install. This installs it to a partition. so you can duel boot it will Windows Vista. Then it will install it. this process took 40mins for me about that so just go of and do something for 40mins. in my case i went and played guitar hero haha.
And then you just have to fill in your time, and date and things like that really, and your have done. installed.

Thanks for reading hope this helps