Is the moon supposed to be DIM-28?

[Kommunističeskiĭ]

I ran my server originally with BukkitForge, and it placed all the worlds inside the world folder. Then I switched to MCPC+ and now all worlds have their own folder. The Galacticraft moon is now in a folder called /world_gcmoon/DIM-28. Is it supposed to be like that or is it only called DIM-28 because it used to be in a folder with 27 Mystcraft ages and it just happened to be assigned that number? I would rather have it be something like DIM0 so then it would work with GriefPrevention. Can I just rename the folder or is that a newbie move?

[Calvariae]

The galacticraft config file has an option to change the moon's dimension - default is -28. I don't see a reason why it couldn't be changed to something else.