Ripping PSX models with a hex editor?

[Shinigami_Guntz]

It's quite obvious as the title and most of the post reads.

But I was wondering how exactly with a hex editor? Do you open the files up with one?

i know this thread is probably dead but im quite interested in this too, i wanna extract model from Klonoa beach volleyball and maybe door to phantomile's cutscenes models as well...