Haha i got the Physical copy in 2012 i think.What else form , except for a physical one , can you have for PES 4??? Speaking as of 2004 standards, not today..
Edit:Can't recall if it used its own .exe to run the game patched, put pretty sure 100%, i installed Wolf Patch over my PES 4 original game, back at the days.
BUt even if you were apirateof the Caribbean, back at that days, it was still a disc copy.