DirectX is a complete package, you have to get all of it, you can't just do a partial upgrade. So in other words, you can not.

Driver update in System Updates. Operating system support: Windows 98/Me/2000/XP. This download includes the complete Microsoft DirectX 9.0 Software Development Kit (SDK). The SDK contains all DirectX ...

DirectX is a necessary software component for nearly all multimedia-related tasks on Microsoft Windows computers, and it has been necessary ever since Windows 95 was released. DirectX version 9.0c was ...