There is a MB:AC for PS2, from what I know that's considered .Ver A and .Ver B is the one for PC. If you have .Ver A (that is, the PS2 MB:AC) it won't help you in any way to play the one for PC for obvious reasons... In other words, stick with the one for PC if you want to use the patch.
"I settled for that shriek. Those dull vacant eyes... oiled cabbage stench of her...! [...] You know what? I'm sorry if I'm not gonna do this the way you want me to or the way you might. But I will not make an angel out of someone who wasn't an angel...!" -Chief Tyrol, on his beloved wife.
Have you heard about the saying that goes something like "drunk people and kids tell no lies"? Well, that's just a fallacy.