As much as I don't want to necro this old thing, I'm wondering if anyone's ever solved that problem of a .dat file not showing up.
Whenever I would try to repack the .dat file, it'd only turn the existing file into a backup, and the new archive isn't created; sort of what Ran's been running into, except I've been trying to modify IN archives.
I've managed to do this with EoSD before, but I'm only assuming that it worked because the .dat was split into six files.
It seems to be doing the same thing with the rest of the games though.
Sorry if it was preferred to make a new thread rather than bringing this back up. It just seemed viable since the issue was already brought up here.