ord.exe

[Sneaksie]

Disk version of the game is already up-to-date, so you don't need to download the patch (it's for download version). Key check on launch was removed in this update.

It should work on P4 normally (maybe slow, but it should work). I suggest updating Catalyst drivers if you didn't do so already since it's likely a problem related to video card.
I would also update the DirectX just in case using this link.