I hope you have a ps2, just get Swap Magic. No modchip required, I bet everyone here uses it. (at least most of the people)
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With swap magic, you are going to have to do "some" modification to the console, so you can swap though. You will need either a swap card, or tape and tissues.
ps2 playback on ps3s are frame lagged thanks to how the ps3 handles image conversion
so even if it had no region lockout and even if you found a usb convertor for the controllers which was compatible and introduced no lag at that point you would still have lag from the ps3 itself
playing ps2 iidx on the ps3 is not and never will be a viable option
Speaking of Hard Drives on PS2's, how good is the compatibility with USB hard drives...
I haven't used it, but there's something called USB Advance you can use, I am unsure whether the legit disc version is still in production (I'm assuming it isn't due to HD Loader being banned or something)
You can get it off a PS2 elf website if you look in the right places though
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In my spare time I make crappy trance mixes.
You can download Resonance here, Aurora here, Distortion here, and 13 here, and Aurora 2 here (NEW!!!).
Feel free to tell me how bad they suck and where I need improvement!