Happy editing, and may your renders never crash.

Hollywood FX relies on older DirectX versions. You may need to install the "DirectX End-User Runtimes (June 2010)" to provide the necessary legacy components for the 3D engine.

EDIUS 6 typically looks for VST or specific "Plug-ins" folders. Use the "HFX For EDIUS" installer/patch often found in legacy update packs.