Ultimate Boot CD

i need to flash my bios with 2 DOS files
i have these 2 files, but don't know where to put them

option 1 - access them from my C: drive, but this means I would have to mount it? not sure how to do that with DOS boots

option 2 - put them on my Ultimate Boot Disk - but where to put them, and how to access them once inside the boot?

Well, if you don't have a floppy drive, I'd say create a minimal bootable floppy (using for example VFD if you're running Windows : http://chitchat.at.infoseek.co.jp/vmware/vfd.html ) , then copy the files you need for flashing on it, and save an image of it.

Then add it in the custom programs using the tutorial that should be somewhere around in the dedicated section.