You can still do this over a single drave. What you've conceptualized can be achieved at the partition level, and deson't require separate drives. Also, FreeDOS can run stand alone on its own partition, so you could build for that and integrate it into Linux whenever. When integrated, you could do something like Alt-F1 to go to your DOS life, then Alt-F2 to go to Linux, and Alt-F3 to go to another Linux console where you had yet something else happening. For that matter, I think you could have multiple DOS machines running and get around the old DOS 640 memory barrier that way. Janina
