With the new updated version of the 1.3 crack, the game does start in XP-SP2 but then the computer locks/freezes/crashes every 10-15 minutes or so.
Behaviour wich is not justified by anything else
, so I suspect it's still something wacky with the crack. On Vista it works flawlessly, as far as I can tell, so it has to be something with the XP compatibility again.