If you need the original text for reference or to reset your changes, here are the end-of-episode summaries for The Ultimate Doom: Closing Story Text Snippet
"The loathsome Spiderdemon... has had its ass kicked for all time." (Added specifically for The Ultimate Doom release). Important Tips Doom Custom Story Text Tutorial SГєbor: Ultimate.Doom.zip ...
: The modern tool for creating "DeHackED" patches. You can navigate to the "Strings" section to locate and edit the long story text sections for each episode. If you need the original text for reference
To change the text within a WAD file like Ultimate.Doom.zip (specifically the internal .wad file), you generally use specialized tools: SГєbor: Ultimate.Doom.zip ...
"Deimos floats above Hell itself! ... Now, it's on to the final chapter of Doom!"