An odd request, to be sure.

[amigagr]

you can try with free dos too

-edit-
i think that you don't need the adf format as you can use direct a dos floppy in the pc

[amigagr]

in win98/milenium you can format the floppy and check the
create an ms-dos startup disk. at winxp you can try to format an 1,44 disk that way and copy the files to a 720 floppy that you have formated in the amiga. i'm not sure if the late can make the disk bootable. i think i had troubles in the past with these dos disks and always searching for win95/98 pcs to format disks. i keep a lot of them just for this reason.