SymphonicAlex: I have an ATI so I've created a profile for the game with Vsync turned on and disabled Vsync in the game. Nothing changed.
Rievier: I don't really know much about ATI since I've never used a GPU from them, so I can't really help you there. Also, I think I was playing the newest version, so probably that's why I didn't had any troubles with the game. I think the original one is from 2004 while the newest is from 2007 or so.
I'm also playing the "new" one, since it is included in The Chronicles of Riddick - Assault on Dark Athena that I've bought here, so I guess it's the "new" version too.
Anyway, let's close the topic. I think we're reached an impasse.