it wouldnt work because the text are just image files on a grid and the letters are used / shared with other text boxes for things so it will look ok with one text box but then you will see it doesnt fit right in other text boxes
if i remember correctly, there are three main texts that are used and i had made a mod where i changed the color to make them easier to read but by changing the image file the edges were a little blurry so some people thought it was easier to read before i changed the color
see it here:
http://www.subsim.com/radioroom/showthread.php?t=152909