how to rip models from madoka magica porable

[Sneakykng]

I see that there is quite a few models that have been ripped from madoka magica
https://www.models-resource.com/psp/puel...aportable/
and I was wondering how to rip the models form that game the files seem to be a cpk file saying archive.cpk thats where I think they would be stored but I have no way of telling