Dual booting by installing windows 7 first and then Ubuntu 12.10 and using Ubuntu boot loader

I am going to write about dual booting windows 7 and Ubuntu 12.10 on a fresh machine which has a non partitioned disc space. Dual booting can be done in a host of several ways like installing windows 7 first and then Ubuntu and using Ubuntu loader, installing Ubuntu first and then windows and using windows loader, installing windows 7 first and then Ubuntu and using windows 7 boot loader, etc. When you search in the internet for dual booting of windows 7 and Ubuntu you get a cocktail of results combining all this. But here I am going to exactly tell you how to dual boot by the method I am most familiar with. I am writing this as I have failed to find a good instructions on the web. I will try to make the method as clear as possible.This method is used only when you are using a fresh non partitioned machine. In this method windows 7 is installed first and then Ubuntu. The tutorial is going to be step by step. This tutorial assumes that you boot both your windows 7 and Ubuntu from CD and that the user knows how to boot from a CD.

1.  ensure you have a copy of windows 7 CD and Ubuntu CD
2. insert windows 7 CD in and boot from it.
3. using the windows 7 installation CD partition the Hard Disk leaving 15GB of space without doing anything.
4. Finish the installation of windows 7 as usual without considering the 15GB of blank space.
5. now insert the Ubuntu installation CD.
6. Click to start installation
7. Tree options appear like: replace windows, install Ubuntu along with windows 7, something else. Select something else.
8. Now select the non partitioned 15B of space.
9. Create a swap partition of space 4GB(or double that of RAM space).Swap  area is made using drop down menu for create partition.
10. Now create an primary partition of 11GB to install Ubuntu using external 4 format from drop down menu.
11. show the newly formatted 11GB of space to install Ubuntu.
12. finish the installation of Ubuntu.
13. Provide a user name and a STRONG password to complete the installation successfully.
14. Restart the machine.
15. You will see a purple screen with 5 options. This is the Ubuntu loader.
16. Select the OS you want from this.