For the PC-98xx no need. It exist already a explanation on the "TOKUGAWA CORP." page. Staff Articles > How to create a Bootable Hard Disk Image
I will not post a link, I think you know why.
To create a raw hard disk image with chdman should be not a problem or you use NP2 as example to create a one with the choosed extension. The rest like to partition and format a hard disk with the tool "FILMTN" (MS-DOS 6.2) is already explained.
