Using an extra monitor could be a solution.
But before starting the game the main monitor resolution should be adjusted to the stock SHIII settings 1024x768 if stock resolution setting is used..
I like OLCs mod very much, its really great. As an appreciation I try to contribute a little bit. Shure, peanuts compared to what OLC did but maybe somebody likes it.
The only thing i was not so happy with, is the chronointerface. You know somebody found that the circular slideruler could easily calculate the speed from the reading of seconds of the speed measurement. So the coloured skales are not necessary.
Therefore I made a simple Junghans clockface, which can be easily copied and pasted in the periscope.tga and the uzo.tga, if somebody wants to try it and is used to work with PSP or similar programs, here is the link. You can regard it as a template to inspire your phantasy.
http://rapidshare.com/files/66145439/JunghansChrono.tga