How to install windows 7 ib a virtual hard disk(VHD)?

1).Boot up your windows 7 cd
2).When you reach welcome Screen  click(Shift+ f10 ) to go to command prompt
3).Type (Diskpart)
4).Type (create vdisk file=c:\win7.vhd max=32000)
5).And Type (select vdisk file=c:\win7.vhd)
6).After that (attach vdisk)
7).And Exit
8).Reboot your windows 7 cd again
9).When you reach (Which type of installation?(Step)) choose (Custom(Advanced))
10).After that choose vhd harddrive and install windows 7.
11).After the installation is finish and restart, you can see two of your windows 7 Operation System.