Key image courtesy of Jaldaboath :) |
Next, use the find-and-replace function (the standard shortcut for this is ctrl+H; you'll have to do it in each of the modded stage files) to replace each instance of BRA (or TRN if the mod is based on the Training Stage) with the 3-letter prefix of whichever stage you wish to replace, in this case LBX:
Click the button to replace all following occurrences and it should pop up a message telling you how many instances were replaced (it's generally a much larger number for the ***.emz files than for the ***.tex.emz files, FYI).
Once that's done, just save it and close, then rename the modded stage to match the 3-letter prefix you just swapped in. In this case, I change BRA.tex.emz > LBX.tex.emz and BRA.emz > LBX.emz.
Now you just copy those modded stage files into your [install dir]\resource\battle\stage directory and overwrite what's already there. Just make sure you backed up those original files first, in case you change your mind later.
UPDATE: If you would rather not overwrite any of the files, there is a way to supersede the original stages in a non-destructive way. Instead of adding your modded files to the above directory, instead go to [install dir]\patch 1a\battle and create a new directory named 'stage'. Put your modded files in there and the game should use them instead of the originals. (thanks to Nemesys_Syndrome for the tip)
That's it. You're done. Now, go try it out and make sure it works :)