You can create the disk using Windows 98/Me by typing format a:/s from the command prompt. Once you’ve created the MS-DOS boot disk, you can copy your BIOS files to it.

Is there something I need to set up on the 2000 box I have setup to handle DHCP (and it's working fine for machiens with Windows already on them and on the older DOS network boot disk I already have).

If you want to try Windows 11 while still running Windows 10, then you can try out what's known as a Dual Boot. Here's how to do that.

Microsoft removed the ability to boot to DOS in order to speed the start-up of Windows Me and to eliminate the support hassles caused by real-mode device drivers that load before Windows.