Thanks for the reply. I just found the system requirements, they are:
System: PIII 800 or equivalent
RAM: 256 MB
Video Memory: 32 MB
Hard Drive Space: 1500 MB
This old pc seems to beat that at everything appart from the 800mhz Pentium III (mine is 700mhz). Would this processor really stop the game from opening? I suppose though if it did run it would run very slowly.