Alright, just to clarify a little more.
Let's make a list of everything you people will need to buy in order to use the tunneling software to play online, i.e. Xlink.
Main things:
* PS2 (with controller)
* TV
* Computer with internet access
* Copy of GT4
* Network adapter
Now there are some different ways of actually hooking up your PS2 to you PC. You need to hook up your PS2 to the PC because the program Xlink, etc. gives you actually turns your PC into another PS2. It's actually a little less complicated than shear alchemy BUT nevertheless tricky. The detatils don't matter much but you should know that the reason it works is because your PC tricks your PS2 into thinking it is connected to other PS2's NOT A COMPUTER!
So there are two ways to do this.
1. Buy a router.
2. Turn your PC into a router.
Option number one is by far the easiest but can cost a little more, also it does not allow you to use your dailup connection, if heaven forbid, you still have one. BUT gives you more options in the long run because routers usually share the internet to 4-8 different devices. It is simple, you plug your internet connection into the router (dsl, cable only) then PC into the router, and PS2 into the router and configure.
Here are the things you would need to purchase for option number one.
* Router
* Two Cat 5/ethernet cables
Option 2 is more of a techie approach but accomplishes the same thing. You take your PS2 and plug into your PC. To do this method you will need an extra NIC/Ethernet card plugged into an extra PCI slot in your computer. If you use dialup then you will only need one NIC card to share your internet capabilities. Then you use software on your computer that "shares" your internet with the PS2 through the network card, windows has this software built in. You will need a special cord that hooks your PS2 up to the NIC called a "crossover" cable that turns the ethernet inputs into outputs, vice versa.
Things you will need to buy:
* Crossover cable (any ole ethernet cable WILL NOT work)
* NIC/ethernet card for PC
* Internet sharing software (built into windows)
* Some networking knowledge to know how to set the IP's and such.
If you do this with dial up, please, please only do it with friends that can put up with your horrid lag if it is an issue.
I think that about covers it.
