I had an idea about a special version of Doom II. Here is what it will be (if possible):
Doom II: BFG Edition
Episode 1: Thy Flesh Consumed
Episode 2: Hell On Earth
Episode 3: Gauntlet of Sin
The idea is, that I would take Thy Flesh Consumed from The Ultimate DOOM, and instead of the regular secret level, it would be Hangar from DOOM 1. Then, I'd take 9 levels from DOOM II, and make Hell On Earth. Then, for Gauntlet of Sin, I'd take 4 levels from one of the various DOOM II add-ons, and then the final 5 levels would be the final 4 from DOOM II, and Grosse would be the secret level.
The question is, how would I go about doing this? I would like to know how to make this frankenstein wad of sorts.