The old Microsoft CP/M ver 2.23 used FORMAT to format a disk and COPY /s to make it a bootable or system disk. Just looking at the version 3 disks on an emulator, it would appear neither of these files appear. The 2009306A.DSK is a boot disk, so you could just copy that disk (with a 5.25 disk copy program) and delete the files you don't need.