Use full tools in in WinPE

BCDboot.exe Provides initialization of the boot configuration data (BCD) store, and it enables you to copy boot environment files to the system partition during image deployment.

Bootsect.exe Updates the master boot code for hard disk partitions to alternate between

BOOTMGR and NTLDR. This will enables you to preinstall Windows 7 from Windows XP.

DiskPart.exe A text-mode command interpreter in Windows 7 that enables you to manage disks, partitions, or volumes by using scripts or direct input at a command prompt.

Drvload.exe A command-line tool for adding out-of-the-box drivers to a booted Windows PE image. It takes one or more driver .inf files as inputs.
Oscdimg.exe A command line tool for creating an image (.iso) file of a customized 32-bit or 64-bit version of Windows PE. You can burn the .iso file to a CD-ROM.
Dism.exe A command-line tool that can create or do service and modify a Windows PE 3.0 or Windows 7 image.

ImageX.exe A command-line tool that enables you to capture, modify, and apply file-based disk images for rapid deployment. It can also work with other technologies that use .wim files, such as Setup for Windows 7 and Windows Deployment Services.

Winpeshl.ini The default interface for Windows PE is a command prompt. You can

customize Winpeshl.ini to run our own shell application.

Wpeinit.exe A command-line tool that initializes Windows PE every time it boots.

Wpeinit replaced the initialization function previously supported by the Factory.exe -winpe

command earlier versions of Windows PE.

Wpeutil.exe a tool that enables you to run various commands in a

Windows PE session