Bearing overlay?

Hi. I've tried installing Pato's 3000-meter bearing and range overlay, but I did so without instructions, as none were included in the download I found. I simply backed up the stock .tga files in the game's Submarines folder, then replaced them with the new ones. However, after that the game would crash whenever I tried to load a career. Am I missing something? I am running the Grey Wolves 3.0 supermod, and if I could find a bearing overlay tool there, I'd simply use it, but I can't seem to find one in the navigation map. Barring any help with Pato's mod, and assuming I haven't simply failed to see something that may well be right in front of me, can anyone point me to a good bearing overlay mod? Perhaps even one that loads via JGSME? Thanks for the help.

Wiffle