@Spex
Um, are you sure that those are the right pics? Your pics clearly show off a PSA, but the hack is labeled as a texture and it's referred to as a texture in the description. Was there a texture hack that came with the PSA perhaps?
Yes, I'm absolutely sure. I actually thought it was a texture too when I downloaded it, but when I double clicked on it to check inside there was no model.
I looked again just now and all that's in the downloaded file is a FitKirby.pac.