OK, using a Steam Download of Civ IV Complete, to get the MOD working with the planets showing was actually very simple. Install the Mod into the BTS Mod folder, then run the Civ4SteamRegistryFix within the Mod folder and hey presto, game works.
Now I have to see if I can fix the AI expansion issue mentioned in a previous post.
Now I have to see if I can fix the AI expansion issue mentioned in a previous post.