DOOM, like many other ID games, has had its source code released to the public, and a community has built itself up around creating new content for these older games.
Such examples of ports and remakes using this source code include DOOMSDAY, jDOOM, and others.
The copies of DOOM and DOOM 2 released with DOOM 3 BFG Edition doesn't include any kind of graphical updates, the ability to run in a window, etc.
Is it possible to use the use the game data from DOOM 3 BFG Edition to play DOOM and DOOM 2 using one of the alternative game engines to gain this functionality? If so, what files do I need to copy from the DOOM 3 BFG Edition folder to achieve this?