You can hook up your console to your computer, almost exactly as hooking up your TV just not using the TV.
I made up my TV tuner, i used the box that came with my video card with the yellow RCA plug. Then i had an adapter that came with my X-530's that converted the regular plugs to the red and white audio plugs. And i hooked all those wires to my VCR, which is connected to the cable. Now what you can do is hook your PS2 to your VCR, and just change those plugs and your done
If you buy a TV Tuner im pretty sure it will work as its the same plugs