I had the same problem and the same concerns about over writing DX10 with DX
9. Its fine, DX 9 will not over write DX 10 but will install the DX9 3D.dll
file which will allow all your DX 9 games to run. If you want to check its
all ok then after you have installed DX9 run dxdiag and you will see windows
vista still reports DX 10 as installed.
Hope this helps.
"Bill" <email@example.com> wrote in message
> "Amity Waisel" <AmityWaisel@discussions.microsoft.com> wrote in message
>>I have NVIDIA GeForce 7600GT with 256MB of DDRIII memory installed. I have
>> installed Flight Simulator X on my XP, and it works great. when I try to
>> that game, there is an error message appears: "FLight Simulator cannot
>> because the version of Microsoft DirectX(R) installed on your computer is
>> incompatible. Please reinstall DirectX 9.0 by running Flight Simulator
>> or download the current version from www.microsoft.com/direcx".
>> I am afraid to install DirectX 9.0c because I have DirectX 10 installed,
>> which came with my copy of Windows Vista Ultimate.
>> How can I cause my Flight Simulator X run with DirectX 10?
>> Amity Waisel
> MS has not yet released the DX10 patch for FSX. Sometime later this year.
> Lots to read on that here
> As for DX9 on vista someone else hopefully can tell you what to do as I am
> a few light years away from trying vista...some even say it slows down