From searching the forums I've found that it's a common problem to find games
that were fine pre-Vista throwing up error messages due to the requirement of
DirectX 7 - despite later versions already being installed.

I've already installed dxsetup.exe from Microsoft's Download Center, which
claims to be backwards compatible from v9.0c, although I've read elsewhere
that versions 7 and/or 8 are not included.

There are various opinions about whether or not Vista is DirectX
7-compatible. I'm trying to find a definate answer, and if so, where is the
best place to find it?