Hakpacks have a higher priority than the Override folder.Given its age, the "Single Player Module" may use different Hakpacks to West and Central. I suggest building a test module as per these directions (remember to add the TLK).Regards,Script Wrecked.
Errr... *shifty* I mean darkstorme and Dorg told me what to do and I did it...
I figured it out! You need to add the override files to one of the Layo Hak Paks If anyone wants to know how, or would like the file, I will be happy to let you know in a PM. It's not complicated.