Second, no need to format the installation Win7PE
WinPE can not install Windows Vista or Windows7, need to use Win7PE guide Caixing. About the installation process and WinPE:
1 image file downloads Win7PE
2, Win7PE.iso the mirror copy of all files and folders to any removable hard disk root partition (preferably primary partition and active), to H, for example.
3, download Bootice http://bbs.wuyou.com/viewthread.php?tid=57675&extra=page% 3D1
Extract the ISO file to BOOTMGR and BOOT folder to the hard disk of a mobile active primary partition. Run bootice, select your removable hard disk, master boot is set to "Windows NT 6.x", partition boot is set to "BOOTMGR boot loader" (partition select partition PE file storage)
4 Restart choose USB-HDD as the first boot to enter the mobile hard disk Win7PE.