Actually, the readme file says to not install components directly from the corresponding folders on the CD. Rather, use the primary setup and select Full Install when prompted. It will then allow you to select which components you wish to install (just uncheck the ones you don't want).
Completely counter-intuitive, I have no idea why Symantec does it this way. It should be called Custom Install, but that's how it's been for at least the last two releases.
Best regards,
Floyd