what kind of animation are you after ?
theres lots to edit
when you first go in the channel the disks spin then stop
the anim of the disks spinning while the wii reads the disk
the anim of the wii disk going down when its finished loading a wii game
the anim of the GC disk going down when its finished loading a GC game
the unknown disk anim
i know theres more in there too but they was off the too of my head
or are you just wanting pic changes
also the diskbann.ash is the same file for pal and ntsc so you only need the one mym for different system menu version and region