HOW Could i Extract a bootable Windows PE2.0 Image on to the hard disk?, and Configure BCD store?
I Want to extract to boot.wim file and configure the BCD store so that computer can boot WINPE2.0 form hard disk .
if anybody know the method, could you help me?

In the docs that came with WinPE, look for the article "Walkthrough: Boot Windows PE from Hard Disk"

I'm trying to do the same thing but can't get Bcdedit to work.

You could use imagex to mount the image and make the appropriate changes. Use /mountrw to mount the image and /unmount when you are done.