i have figured out you can have multiple space stations so far i can only get three but this method worked 3 times with me tonight 1st turn player invites of to false at C######\AppData\Roaming\.minecraft\config\Galacticraft/core ,,i started and earlier version up in 1.6.2 unlocked the space station went in side then jumped bk to over-world went on 1.6.4 latest today played the same file it unlocked space station no 2 then quit, started a new world then quit go to your save files copy only the folders ( and what ever over mods are saved example morph.dat ) YOU WILL WANT TO COPY THE SAVE FILE WITH TWO dim-space station into the 2nd save file you made, start minecraft in a different username then you used before load it unlock space station you'll have three space stations , i hope this works for you as it did for me i can upload a save to dropbox if interested the worlds are not special lol