I think as a general rule of thumb:
the cloud.dat reference (thats what ill call em from now) refers to a data selction (collection of files) that are specific to their functions. Ie if the exe asks for choas.dat its expecting a set collection of motions, tex files and details, where as the cloud.dat has the collections of motions/images for attacks,magic,summon motions.
so changing a limit reference to a player reference causes the game to crash because the info or collection of files differs to the limit collection
anyone get that? anyone know some more...
look for neo, see the all the special effects function calls?