All right, I'll try redoing the code stuff again...
And it's done this with multiple hacks, whether they be just simple textures (that work when moved to other FitPurins). It's actually done this since I first got hacks, way back in mid '09, before newfangly vertexes and model imports.
AH there's the problem, FitPurin02 has it's own Hat texture and vertex, this is probably the cause for the crash as it cannot load the textures correctly. Or so it seems. Try download one of the Vertex hacked Jiggly's for FitPurin02 and see if it works.