I'd recommend writing something completely new.
Using theories is totally a grey area where even I do not dare going to. :D
But you do realise, that if it's online, those files would also have to be downloaded onto your disc, right?
only into your internet cache.
So you might as well download it here. And maybe put in on a memory stick, will work that way as well.
Yes, this represents the game being unable to load location files.
two possible reasons:
1. sub_loc folder is not present in the same folder as the main game file;
2. Operating system doesn't allow one file to load another file into itself. Not much I can do about this. :/