There is a practical alternative to creating a Windows PE in order to obtain an independently bootable Windows, e.g. the use of special Windows drivers for RAIDs or SCSI/SAS.
Simply create a temporary clone of an existing Windows Installation. Install additional required drivers before or after creating the clone. This clone will then offer a Windows which can be booted independently from the installed operating system, similar to a Windows PE. Start HDClone/W from there.