PS1 and PS2 PAL games can be converted including the video footage built in the games to NTSC without resorting to converter boxes. Just use a couple of conversion tools to make it display in NTSC and burn a new disc. For the PS2 games installed in the PS2 Fat hard drive, no mod chip needed.
Playstation PAL NTSC Conversion Guide
http://www.racketboy.com/forum/viewt...388723#p388723