DirectX(r) Detection & Installation
The Doom 3 installer does not check for the version of DirectX(r) you
have currently installed, it just prompts you to install DirectX(r)
9.0b. Activision recommends allowing the installer to proceed with the
DirectX(r) 9.0b installation, even if you think you may have 9.0b
installed. Re-installing DirectX(r) 9.0b will not harm your DirectX(r)
configuration. Doom 3 requires DirectX(r) 9.0b to install and play.
E vidiš da nije!