A big and warm welcome to you Sire.
No, this is certainly not normal at all. I have a similar but tad slower machine that recommends 27-28 FPS (I run it at 21) with a res of 1024x768 and most stuff on medium.
However that being said, a "slightly hacked version????" does present some worries, that it would be good if we could clear out.
1) If you mean a modified version, then yes you can do some damage to the configuration of the game that makes it run much much slower.
2) If you mean a pirated version of the game, then no offence, but don't expect much help. We have a policy of not offering any help whatsoever to people that do not pay for the game. I am not saying that you are using illegal software, but if you are, then please don't press the issue.
It's only after we've lost everything, that we are free to do anything.