If you cannot install the game, it's because you probably don't meet the system requirements. To find out about this, check the below system requirements:
- Windows XP/Vista
- DirectX 9.0c
- Pentium 4 @ 2.4GHz or Athlon XP 2400+ or above
- 1Gb RAM
- Graphics Card: GeForce 6800 or Radeon X800 or above
- Creative Sound Blaster X-Fi Sound Card
- 2x DVD-ROM Drive
- 4.5 Gb Hard Drive Space
If you have Windows 7, try running the installer in compatibility mode using right click on the setup file followed by Properties > Compatibility.