Thanks Adam for your quick response.
I have selected 1. Typical and then gave next
then I got three options like
1. Installer Disk - In this I can select only my CD Drive. My Harddisk drive not displayed
2. Installer Disk Image File - In this am not able to select anything since i dont have any iso file.
3. I will install the operating system later
Which one I can choose in these three options.