Instead of using XP's boot disk stuff, I would get a DOS boot disk image and copy it to a floppy using RAWRITEXP. Put a copy of whatever you need (flash program, BIOS file) onto the floppy and edit the autoexec.bat file in Notepad to just say: @echo off ADSFI711.EXE A6728IMS.3A0 Leave out the A:> As a (probably important) side note: While viewing the floppy in XP, autoexec.bat will probably not be visible. To rectify this, get into Folder Options (either through the Control Panel or under the Tools menu). Under the view tab, hit "Show hidden files and folders" and uncheck "Hide protected operating system files (Recommended)". Tell Windows, that yes, you do know what you're doing and hit OK. Autoexec.bat should appear there. Be sure to re-enable "Hide protected operating system files (Recommended)" after you're done. After this, use RAWRITEXP to recreate the image file, using the edited floppy and it should work for your Multi-boot CD. I'll post a link to a ZIP with the image and RAWRITEXP in a minute. EDIT: Here's the link: http://www.ray5.net/jonathan/boot/boot.zip