DirectX 9.0c is included on the disc. Put the disc in and from the choices give I think it's other options, you should find DirectX under there. Hope that helps. If not, go to Microsoft's webpage, key in DirectX 9 and it should take you to the download page or you should be able to find it easily from there.
Look in the instruction manual for downloading the game. There should be a part over downloading directx 9c from the disc. It should have a run code for downloading it. --- acer aspire5610z, 160gbhdd, 2gbddr2ram, 1.6 GHz Intel CoreDuo pro, 15.4in acercrystalbrite widescreen