Figured out a little bit about volume. Pinsound will create a text file called "gain" that contains a number to adjust all the sound files in that specific folder. So if you want a specific sound to be louder, and it is the only file in that folder, the "gain" text file will just have "20" or some other volume that you can set in Pinsound Studios or manually create in the folder. If you have several files in a folder, the gain will be applied universally. Also, you can set it in folders, such as "voice" "sfx" "jingle" or "music" and all the files in those underlying folders will be set with said gain setting.
Audacity does have the ability to "normalize" several files so their volumes are relatively close, so hopefully multiple files in a single folder will have about the same level of loudness.
Still can't get Pinsound Studio to show all the file folders though...