All I've ever done since terrafarm came out, was take the newest version number of TF as my "main" used version. Then as people release edits and buckets and equipment with either the files for TF, or their own version of TF that includes their equipment and stuff, I add all the files from everyone else's TerraFarms, etc to my "main" version of TerraFarm. All it is, is adding individual files into the mod's folder(s), adding text to a text file, and then zipping it back up as a mod.