If you are making floppies under DOS you can use the rawrite utility included on the Red Hat Linux CD. First, label a 1.44 M 3.5 inch floppy boot. Then you would execute the following command (assuming your CD is drive d:):
d:\dosutils\rawrite.exe
Rawrite will ask you for a filename. Enter boot.img. It will then ask for a drive, this should always be a:. If you need to make the supplemental disk label another 1.44 M, 3.5 inch diskette supplemental and then run rawrite again. When prompted for a file name, enter supp.img. Again, enter a: for the drive name and continue as outlined above. You should now have two disks labeled boot and supplemental