[quote name='capitalist_mao']Your only alternative to the disc swap and modchip route is use a Memory Card exploit in conjunction with a network adapter and an HD. Even then, there's no guarantee you can play the game off of the HD, since a few (not a lot, but a few) are incompatible.
This really is your only alternative. [/quote]
I'm playing on my friends Modded PS2 with no problems (well almost none...the only issue is signal conversion from PAL to NTSC, but I got something to fix that read below....)
Most PAL games (most) have an option to switch to 60hz mode (the two I own Jackie Chan Adventures does this from the startup screen) and Psyvariar (have to go into the options menu) the only one I own that does not is Maken Shao.
Otherwise the imports play perfectly I think he paid around $100 for the chip plus installation, a little steep, but you can play anything and I mean anything.
Also, when it comes to running PAL games, your PS2 will output whatever format your game is from. That is to say, a PAL game will output a PAL signal, which is really obnoxious (especially considering how easily one could play imports on a DC. I'm not sure if the NTSC Dreamcast always outputted NTSC signals, or if all PAL games outputted NTSC normally, and people had to change it).
That being said, you'll have to convert PAL games to run on NTSC TVs. Ripping the disc, running a conversion software and playing it. Even then, there's not a 100% success rate, since some games are not playable. Not to mention the screen difference (576 horizontal lines of resolution vs 480) will make the image offset and can be a pain to reposition just right.
All DC games were made to be able to convert the game to either 50/60hz Sega was ahead of their time. The PS2 unfortunately doesn't have this ability with PS2 games (pay attention here) I tried some PAL PS1 games I own on it and they play perfectly. Why the discrepency, I dunno, but they don't automatically adjust like the others.
And lastly the way to overcome this problem of PAL vs. NTSC output is to get a VGA box. Simple enough. Your monitor with adjust for it and play'em just peachy, I bought a decent one for $40 recently and don't regret it one bit. You can get cheaper ones for around $20, but they only consist of input and output for video (ala the Official DC one) If your interested I got mine from eStarland.com.
Good luck, I'm in the same boat you are. Hope these options help a bit.
