dism /Mount-Image /ImageFile:"C:\WinPE\boot.wim" /index:1 /MountDir:"C:\mount" dism /Image:"C:\mount" /Add-Driver /Driver:"D:\F6flpy-x64" /Recurse dism /Unmount-Image /MountDir:"C:\mount" /Commit
When you see the empty drive list:
dism /Mount-Image /ImageFile:"C:\WinPE\boot.wim" /index:1 /MountDir:"C:\mount" dism /Image:"C:\mount" /Add-Driver /Driver:"D:\F6flpy-x64" /Recurse dism /Unmount-Image /MountDir:"C:\mount" /Commit
When you see the empty drive list: