How to change the drive letter in the PE system?

I want to change the B disk in the PE system to a W disk. How to modify it? You need to modify the following places: 1. There is a need to modify WINPE.INI: Configuration file starts MOUN %CurDrv%\\MINIPE\\OP .WIM,W:,1ENVI OPDir=W:\\External program 2, WinPE.IS_ kernel decompression, there is a SETUPREG.HI_ under system32, and then decompress, get SETUPREG.HIV, use Registry Workshop to load as registry configuration Unit WinPE, there are two places to change: [HKEY_LOCAL_MACHINE\\pe\\ControlSet001\\Control\\Session Manager\\Environment]"Path"="%SystemRoot%;%SystemRoot%\\System32;W:\\external program\\PE_OUTERPART\\ MMC; ​​W:\\External Programs\\Internet Explorer"[HKEY_LOCAL_MACHINE\\pe\\ControlSet001\\Services\\Ramdriv\\Parameters]"DriveLetter"="W:"