How do I change fonts?

I have a feeling this is asked often, but how would I be able to find a font, add it to the game, and use it? Just to make the game look a bit more square.
If you have any fonts that are good for this sorta thing, let me know that too.
I run Windows Stable

Press Start K is a pretty good font. You can edit your font by going into the data folder and changing it in the fontdata file.