If it s just ps2 sfo the problem...they were captured recently and documented on the wiki
SFO for playstation 2 games exist, even there are 2 differents:
http://www.ps3devwiki.com/wiki/PARAM...rameters_Table
2G (ps2 little icons gray will appears but games aren t bootable at the moment and probably never) & 2P (recent release from PSN )
You can create your own ps2 sfo easily or try to use others category SFO but i don t know about from ps2 disc on CECHA (Cobra/MultiMan?)