Standby, I'm getting the wording here.
Okay, that threw me for a sec, its been awhile since the Vista word popped up.
The XP version will run fine on Vista64. You may need to mod the water shaders in the terrain file like we did with YAP2 to eliminate the CTD at mission end.
If your SF2 is running good with the Vista64 and DX10, the Win7 version should work for you as well.