Load in your Windows 7 DVD and boot it. It will now load the setup files.
Select your language, time & currency format, keyboard or input method and click Next.
Check I accept the license terms and click Next.
Click Upgrade if you already have a previous Windows version or Custom (advanced) if you don't have a previous Windows version or want to install a fresh copy of Windows 7.
(Skip this step if you chose Upgrade and have only one partition)But If You Want Select Custom Than Select the drive where you want to install Windows 7 and click Next. If you want to make any partitions, click Drive options (advanced), make the partitions and then click Next.
It will now start installing Windows 7. The first step, (i.e. Copying Windows files) was already done when you booted the Windows 7 DVD so it will complete instantly.
After completing the first step, it will expand (decompress) the files that it had copied.
Enjou!!! Don't forget comment.. :)