I'm having problems with a Ver3 PS2 playing copies to backup games, Mercenaries takes a long time to load up, you can go right through to the character selection screen, a short fmv afterwards then starts to load the game proper, at this point it hangs. GTA3 SA works ok but sometimes you lose parts of the background and scenery they just go blank or white.
Killzone take ages to load and again sometime you lose the scenery.
The original discs work ok.
I use Ritek G04 (datawrite Yellow discs) burnt at X2 using DVD Decrypter or Nero Ver 6.
The PS2 is quite old, using the messiah chip, don't know which one? think it was the last one produced.
Could this be a laser problem or media?