Quick summary of what we're after here... Xlink (http://www.teamxlink.co.uk) lets you create a virtual LAN using the Internet so that PS2 games that don't support online play can be played online. The easiest setup uses a home network - preferably wired - where your PC serves as a tunneling device between your PS2 and the Internet. If you have a router and multiple PC's already, you'll just need to install the software, connect your PS2 and get gaming!
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Does your PS2 have the Ethernet port? Do you have a PC located appropriately to connect to your PS2?
If you're interested, say so and indicate your ISP here. I understand this works better for people on the same ISP...
Tailchaser: Comcast