iirc, in conf.ini look for this section:
[game]
nosubtitiles = 0 and change to 1 (1=yes, 0=no)
in the controls part of the game look under "misc\toggle speed bar" and see what key is mapped. when you play, you can cycle through what you want with that key/control (mph/ft, kph/meters, knots, hidden)
I would recommend you patch up the game and fix the voids and windowed screen. but it is up to you, of course.
the official patches
http://www.mission4today.com/index.p...p=show&kid=584 if you dig into that link, there are readme that tell what the patch fixes. you have to install them in order if you go that route.
good luck and enjoy the game.