here in Korea, 90% of all the shops sell copied games >_< so they are cheap... like in lots of places, you can get 3 dvds for like 10$
but back to the topic, my friends says that the more you upgrade your PSP, the guard thing gets updated, so many copy games won't work
They say if you upgrade over v3.0 copy games won't work....
One of them upgraded for real, and then he says he can't run his DJ max copied which worked fine before upgrading...
So i just thought, is there a way to like un-upgrade your psp, and also is this really true??