For Ultimate DooM: […]
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For Ultimate DooM:
1. Install the Version 1.9 Shareware (DOOM19S.ZIP) to D:\DOOMU
2. Delete D:\DOOMU\DOOM1.WAD
3. Copy Q:\Setup\Ultimate Doom\doom.wad to D:\DOOMU\doom.wad
4. Copy the Version 1.9 Ultimate DooM patch (19_UDPAT.EXE) to D:\DOOMU and execute it.
5. Execute the PATCH.EXE program.
For DooM 2
1. Install the Version 1.9 Shareware (DOOM19S.ZIP) to D:\DOOM2
2. Delete D:\DOOM2\DOOM1.WAD
3. Change D:\DOOM2\DOOM.EXE to D:\DOOM2\DOOM2.EXE
4. Copy Q:\Setup\Doom2\DOOM2.WAD to D:\DOOM2\DOOM2.WAD
For Final DooM: TNT - Evilution
1. Install the Version 1.9 Shareware (DOOM19S.ZIP) to D:\DOOMT
2. Delete D:\DOOMT\DOOM1.WAD
3. Change D:\DOOMT\DOOM.EXE to D:\DOOMT\DOOM2.EXE
4. Copy Q:\Setup\Final Doom\tnt.wad to D:\DOOMT\DOOM2.WAD
For Final DooM: The Plutonia Experiment
1. Install the Version 1.9 Shareware (DOOM19S.ZIP) to D:\DOOMP
2. Delete D:\DOOMP\DOOM1.WAD
3. Change D:\DOOMP\DOOM.EXE to D:\DOOMP\DOOM2.EXE
4. Copy Q:\Setup\Final Doom\plutonia.wad to D:\DOOMP\DOOM2.WAD
See http://doom.wikia.com/wiki/Doom_1.9 for more information about the differences between the Version 1.9 executables. Because the Final Doom executable is derived from the Ultimate Doom executable, but is not identical, there is no way to get an exact copy of the DOS version using the above approach.