"This experimental NTBOOTDD.SYS is hard-coded to use a flat hard disk drive image called WIN.HDD in the same filesystem as NTLDR. The file does not need to be contiguous. The "hosting" filesystem can be FATXX, NTFS, ISO9660, or TFTP. A minimal hosting filesystem might contain:
\NTLDR \BOOT.INI \NTDETECT.COM \WIN.HDD
This "driver" will [attempt to] present a virtual SCSI disk for booting from. Your BOOT.INI might look something like this……“