I have pak files but I can't open them. no luck with the bms scripts

I checked and saw that they have a stpz compression and stpk.
I decompressed it to a stpk but now I'm stuck.
anyone knows how to extract those pak files?
aluigi wrote:Those "$CMP" and "$CL0" magics sound familiar and I war right:
https://zenhax.com/viewtopic.php?f=5&t=831