dan the man this will answer every thing
https://www.kcej.co.jp/products/mgs2_sub/english/
as for the ps2 version compared to the xbox, to put it simply the ps2 version has no slow down(quoted by konami or whoever they call themselves) and it has a few extras that are not in the x-box version
(u cannot play the ninja in story mode,or even have the costume, but on the upside u know that invisibility object from the first???, u can aquire it in story mode this time around)