Create your own bootable Windows(XP,VISTA&7)

There are many ways to create.But the method shown below is the easiest one.
To begin you need a pendrive of 2 GB for XP and 4-8 GB pendrive for Vista and 7
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• Download WintoFlash from here.(Its a brothersoft client you can download the software.For your safety!).
• Click the Windows Setup transfer wizard and select next.
• Here you will need to define two paths where the 'Windows File Path' points to the location of the Windows Installation  disk and the USB DRIVE specifies the location of  Pendrive. 

•  that will be used for creating the bootable installation routine. Click on'Select' and choose an appropiate path for both.
• Accept the Windows Licence Agreement and click Continue.
• The warning message will make you feel terrified.Its nothing but just to notify that you are going to format the prndrive.If you have used the wrong one you can change it.

Now you should have crated the file.Now you should have the access ti BIOS and Change bootable Device Priority to USB.You should have started the installation if you have followed the above.......... :)