Looking for some help with PSP saves

[lichess]

Are save files in max drive/x-port/codebreaker format(.max, .xps, .cbs) really valid for PSP? Specifically, is there a way to use them in PPSSPP? I was under the impression that these formats are for PS2/Xbox/GC.


BACKGROUND:

Every PSP save I've used so far has been in .zip format with the 3 files packed into it. But for this older game, Smackdown vs Raw 07, I wasn't able to find a good save in that format through my usual source(Gamefaqs). However, there were pretty good saves listed on caws.ws which is where this little confusion's come from.

Not sure if I'm allowed to link there but nevertheless, it wasn't just a case of a whole bunch of PS2 saves being listed in the PSP section by accident, the uploader himself has specified it's for PSP.