I just found how you can use the Blue Marble textures in the Star Trek mod:

1: download and install Blue Marble
2: go to Program Files/Firaxis Games/Sid Meier's Civilization IV/Beyond the Sword/Mods/Star Trek/Assets/Art/Terrain (Create the ~/Terrain folder if it doesn't exist yet)
3: go to Program Files/Firaxis Games/Sid Meier's Civilization IV/Beyond the Sword/Mods/Final Frontier/Assets/Art/Terrain
4: copy all files from here to the folder in step 2.
5: start the mod and enjoy the sight.

Good one, apenpaap!:goodjob:

PS How about a screenshot (or two)?

OK, here are some screenshots (I used flying camera mode for most of them):

Wow! Looking great!:goodjob: