HOW TO MAKE AN INSTALLER FOR A DOSBOX GAME:
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1. Extract "DOSBox - My Files.zip" into a directory.

2. Extract the game files into "\My Game\mygame"
(I use lowercase and 8 characters max for this but it shouldn't matter).

3. Edit "\My Game\dosbox\dosbox_single.conf".
Change 'mount c: "..\mygamedir"' to match the directory name you extracted the files into.
Change 'mygame.exe' to the name of the .exe or .bat file that starts your game.

If your game has a "Setup.exe" file (or whatever its named),
edit "\My Game\dosbox\dosbox_setup.conf" and do the same as you did above.
---OR---
If there is no "Setup.exe" file, delete "Start My Game Setup.bat" &
"\My Game\dosbox\dosbox_setup.conf".

NOTE: Occasionally you may have to tweak the
"\My Game\dosbox\dosbox.conf" file a little bit if a game does not work properly.

4. Rename the "Start My Game.bat" & "Start My Game Setup.bat" files to
the name of your game.

5. Install "Excelsior Delivery" or whatever install creator you want.
Add all the files and directories inside the "My Game" directory.
Add a shortcut pointing to "\My Game\Start My Game.bat"
and "\My Game\Start My Game Setup.bat" (if needed).

Excelsior Delivery is here:
https://drive.google.com/open?id=1QeekTCa0LZM … 6jXxVDtG7N1Eq1S

(I updated the files to DOSBox 0.74-3)