try courier.fon, that should work ok afaik, there is also an error in that code, it should read
set text font "app932.fon"
and to save you hopping to the window fonts folder and then having to come back from there when you want to save the game or anything, you could have done
set text font "c:\windows\fonts\app932.fon"
and make sure you have a size 20 listed amongst the sizes available, they can`t rescale on the fly like TT or proportional fonts, if that size isn`t listed than you can`t have it (unless you use an app to make that set of bitmaps and add them to the font)
Mentor.
PC1: P4 hyperthreading 3ghz, 1gig mem, 2x160gig hd`s, ATI radeon 9800 pro gfx, 6 way surround sound, PC2: AMD 1.2ghz, 512mb ram, FX5200 ultra gfx, stereo 16 bit soundblaster, ups.