I have the "Best of PC" pack (in english), and recently bought the FoC expansion in Germany (not sold here anymore, and it was rather cheap.) Problem is, after I installed it, all of the text (descriptions, etc), and audio was missing. The German files were there, but I'm guessing they don't work in conjunction with the English files. So I downloaded the 1.1 patch, which took care of the text. But the audio is still missing. Can anyone send me the English audio files for FoC or would that be illegal?
To be honest, Ive never heard of this problem before. You could wait here a bit longer, or you could go to Petroglyphs own forums, ask them for help.
*Look up Petroglyph Forums*