@Nocat-
Thanks so much for the tip, it turns out that I had changed my system locale to Japan some time ago and completely forgot to change it back
So now the Install.bat seems to be functioning as its supposed to, only now I'm having an issue where it quits abruptly during the install process, right after doing something with Kelsey's audio with the Smoothpack. I'm thinking it doesn't like something about one or more of the mods I've got, since I tried just the bare minimum install of BWP and that worked fine. I'll keep poking at it until I either figure it out myself or I end up back here pleading for assistance