Also as I stated (I'm assuming the texture resolutions are huge) large upscales are really bad for the game anyway, restraint is a big part of making mods for ffxi and x2 should really be the limit imo.
Unless it's actual dat files then this is a modders resource and not mods for players to use. You have to convert the images to dds files and then put them back into the dat files individually (this is a massive job if you're going to do them all).
If it is then it's going to be pretty much useless to you unless you're a) prepared to get into modding and b) willing to put tens to hundreds of hours into putting all these images back into the dat files. Is it just a large zip with png upscale files?
Anyone have links to guides on how to actually convert all these into dats?