So I'm trying to install the weapon practice mod using Floating IPS, but I can't figure it out for the life of me. I am using Linux 1.001, and I've tried doing what some other forums on here have said, but nothing works. The program tells me to select a ROM file, but as far as I'm concerned there's not one of those for Undertale. Any help?

you need to apply it to your data.win file so change where it says ROM to all files