How to change Windows XP Home to Windows XP Pro?

I want to change my OS from Windows XP home to Windows XP Pro. I installed Windows XP for th first time.

http://media.photobucket.com/user/MajorsHomeImprovement/media/24_zps9f2ef286.jpg.html

Firstly plz tell me how to check whether it is Windows XP Home or Woindows XP Pro which i have instaled.

If it is Windows XP Home, do I need another cd to install Windows XP Pro or will it be there in the same cd.

If it is same cd how to upgrade.

To tell which OS it is – either look at the CD you installed from – or right-click My computer and go to Properties – The 'General” tab tells you what OS you have.

If it is Home edition – you will need another cd for Pro – they are not together