From what I can tell:
Place the font you want to use in the “Font” folder of your “Data” directory.
Open up “FONTDATA” in your “Data” directory with a text editor.
It’s currently:
Change it to 3 lines, for example the old font is:
Terminus
8
16
First line is your font’s file path. The “Terminus” font does not need a font file (.ttf).
Second line is the game screen’s horizontal size.
Third line is the game screen’s vertical size.
