need help with [psp] Ratatouille (USA)

hello

I'm just recently downloading the game Full Metal Alchemist Brotherhood on PSP

from this link http://www.emuparadise.me/PSP_ISOs/R...57490-download

and i found the extracted file contains files like this :

st2-ratatpsp.rar
st2-ratatpsp.r00
st2-ratatpsp.r01
until
st2-ratatpsp.r21
st2-ratatpsp.nfo
st2-ratatpsp.sfv

when i click the file name "st2-ratatpsp.r00", inside i found a file "st2-ratatpsp.iso", i'm relieved, but

when i try to extract using 7z, the report says data is broken.

please help me.. i won't get to play anything in this short lived holiday.... DX

It's a split archive, probably the scene release, inside a single archive.
Extract from st2-ratatpsp.rar part (that's the first part).