To be completely honest, this is what I'm trying to do:
About a month ago, I bought this bundle on Steam that includes Ultimate Doom, Doom 2, Final Doom, and the Master Levels for Doom 2. I realized, when looking at the files, that the games were just the old files with a DOS emulator (DOSBox). I then downloaded DOSBox 0.74 and put each game in the A: drive. What I want to do now is just put the files onto a floppy disk of some sort and be able to plug the disks in and play, like an old DOS PC would. The thing is, the games I want to put on floppy disks (Doom, Quake, maybe some abandonware) are 15MB or more. That's why I was trying to get full compatibility: so that I could fit what types of games I want on many sizes of disk. I know CD and DVD is an option, but I don't like all that empty space on the CDs, as I have tried putting the games on CDs, and they're more prone to damage. If the game files go over 1 GB, i'll typically use a CD or DVD, but I want to try to stick to 3.5 or 5.25 if possible.