teceem: In game folder:
file: goggame-[numbers].info
Edit with text editor.
Change path/file name.
Save.
SirPrimalform: Sounds to me like that's effectively equivalent to renaming the .exe. Given that the OP got a file size mismatch error, why would changing the path instead of the filename fix that?
I know, it doesn't make sense - but it's worth trying out. ;-) (maybe the size matching only happens with the original file name?)
(a bit off topic) Some old P&C adventures seem to have a few illogical puzzles - but they can be perfectly logical if you know the context the devs had in mind.