My friend wants to sell me his modded ps2 but he doesn't know what mod chip was installed as the system was not his to begin with. I only want to use the system to play import games regularly and US games. He tells me it plays back up games just fine. My question is, can this system play imported games? Do all mods allow you to play imported games? Are there any mods out there that only allow you to play back-up games and not imported games? Should I be worried and consider not buying it?