Well my problem is probably my own doing, I've installed a few mods first up.
The game is running aces, ultra settings on my rig.
Buuut...dialogue and shop windows have the error message (PipOS Error 26 - File Not Found!) as in the title.
See Screenshot:
http://img576.imageshack.us/i/piposerror26.jpg/
I'm guessing I'm missing an image file or one of the xml files or something, so what is it likely to be? . As I stated before, the game is running aces, so I don't wish to re-DL the whole thing again.