Convert a PSP model that is ".MB.PSP.GDE"

I open a psp game and find that the models not are as .gmo but in to a weird ".MB.PSP.GDE" .
How i can read/convertit it?
No one knows This format?

I attach the files i want, also the textures.
( also .gim textures are soo tiny, is right or i have convertit it in the wrong way?)

  Ratchet Psp Data.zip (Size: 120.63 KB / Downloads: 0)