I think my advice only refers to Red Hat installation CDs. After looking thru the Debian website, I think that you can install from DOS by running one of the following batch files:
------Look at this page:
------------and this section:
188.8.131.52.4 MS-DOS Installer Batch Files:
MS-DOS batch file for starting Debian installation from MS-DOS. This batch file is used in installations from hard disk or CD-ROM. See Booting from a DOS partition, Section 5.4.1.