Thank you Ade, I forgot that, have installed cps2emu again from App Man, the problem was as someone wrote earlier on this thread that the roms must be in .zip, mine were in .ZIP, now they show on cps2 open roms dialog and I have cached all of them using the app itself, thanks anyway for the help. Tomorrow or later will try to install Gngeo wich is also a great emu for SNK games, then need to add my N900 Bluetooth address to my ps3 controller.