Windows PE is a pre-installation for Windows Vista; it replaces MS-DOS. Microsoft used many of Windows Vista's components to create Windows PE. If you cannot get Vista to boot up, using the Windows PE boot disc will give you the tools to troubleshoot the problem. Windows PE is operable from the Random Access Memory (RAM), which allows you to use the CD containing the software or drivers.
You need the following: A computer with Windows Automated Installation Kit AIK
1. At the command prompt, run the Copype.cmd script
The script requires two arguments: architecture destination copype.cmd x86 c:\winpe_x86
2. Copy the base image (Winpe.wim) to the \Winpe_x86\ISO\sources folder and rename the file to Boot.wim. copy c:\winpe_x86\winpe.wim c:\winpe_x86\ISO\sources\boot.wim
3. Create a bootable CD/DVD or USB. This option requires that you create an .iso file by using the Oscdimg tool. For example
4. Burn the image (.iso) onto a CD-ROM, DVD-ROM or USB Flash Drive.
In this step, you create a bootable Windows PE RAM disk on a CD-ROM disc by using the Copype.cmd script. Windows PE RAM enables you to start a computer for the purposes of deployment and recovery. Windows PE RAM boots directly into memory, which lets you remove the Windows PE media after the computer boots. Once you have booted into Windows PE, you can use the ImageX tool to capture, modify, and apply file-based disk images.