I'm very glad to see that interest in Doom, in particular Doom for DOS, is still alive and well. I'm very much out of the loop so I may not be of much help, but I do have a file called FDOOMP.EXE on my hard drive. I'm currently in contact with axdoomer about giving it to him. Aside from my contact with axdoomer, is there a location you would like me to upload this file to?
P.S.: I'm quite surprised I managed to come up with a "fork" that no one has managed to reproduce :). I had practically no programming skills at the time so I must have found a step-by-step guide somewhere.