Hmm, about the lagging problem, maybe it is due to your
PSP’s firmware? Mine is version 3.03OE-C.
Sometimes the older earlier versions might have some problem
playing the latest game. But you can upgrade your firmware. I know
of someone who upgrades firmware for free I guess. If you want the
details, do PM me. The game might be also lagging because there is
problem with the game itself. Sometimes some PSP can’t play those Ripped games. If you know what I
mean. But I guess its better to play safe and not downloading too
much miscellaneous stuff into your PSP. There
might be a virus causing your PSP to hang and
give you loads of problem. So, good luck~