because up to IX, there is a versions for pc and you can just download that to play.
or am i basically downloading a ps2 play disc which i can burn onto a dvd to play on ps2?
The answer is yes, you can play Final Fantasy X on PC using PCSX2, but the FPS is very low, except if you have a very powerful PC.
You can also use the ISO file to burn it on a DVD-Rom and run it on a modified PS2, or use Swap Magic and similar software.
Thanks for the answer ROKI.