You could just use DoubleDOS [1] to run the BBS in partition 0 and the door could run in parallel in partition 1. This was my setup before Windows 3 and DESQview replaced it.
DESQview never really clicked with me. Did run DoubleDOS and when I was a TA (or whatever it was) providing support in the computer lab in grad school (most people didn't have their own computers) it was a convenient way to switch between whatever official systems I needed to access and my own stuff.
DESQview never really clicked with me. Did run DoubleDOS and when I was a TA (or whatever it was) providing support in the computer lab in grad school (most people didn't have their own computers) it was a convenient way to switch between whatever official systems I needed to access and my own stuff.