DirectX 10

Nope or at least not by Microsoft anyway

There'd be no financial point in giving people a reason to stick with XP instead of moving onto Vista

I know that, but is there some chance that somebody will create a DirectX 10 port for XP?

Take your chances.

http://www.technospot.net/blogs/download-directx-10-for-windows-xp-from-alky-project/

From MS.

http://msdn2.microsoft.com/en-us/library/bb219721.aspx#Will_DirectX_10_be_available_for_Windows_XP

More on it.

http://www.freakitude.com/2007/04/25/directx-10-for-windows-xp/

Pre alpha has a long way to go

I'd be suprised if it ever saw the light of day in a stable format

RadarMan wrote:

Take your chances.

http://www.technospot.net/blogs/download-directx-10-for-windows-xp-from-alky-project/

From MS.

http://msdn2.microsoft.com/en-us/library/bb219721.aspx#Will_DirectX_10_be_available_for_Windows_XP

More on it.

http://www.freakitude.com/2007/04/25/directx-10-for-windows-xp/

Tried it already. I have this to say about it: Do not under any circumstances use it! It messes up your FSX files and then you have to re-install FSX.