Okay, since this features a mod. I'd better go over the rules for mods quickly.
1) Do NOT install to your Diaspora data folder. Instead create a new folder. Name it what you like (I called mine 3rd_Party_Mods). Inside that create a folder called data with a missions folder inside it. Stick the VP inside the 3rd_Party_Mods folder and the mission in 3rd_Party_Mods/data/missions. Then when you run the launcher, pick 3rd_Party_Mods as your mod.
2) Every time a new mod includes table files, you'll need to create a new mod folder for it. Most modders will do this for you and simply give you something to extract to your Diaspora folder.
Follow those rules, and you'll be fine. But if you install stuff to the main Diaspora folder, you could very quickly find yourself in trouble once you get mod altering different parts of Diaspora without playing nicely with each other (or any future Diaspora patches).
*Takes Dev/Support Agent hat off* With that out of the way, I'll download the mission and give it a try.