Well, I use P5. Never knew a previous version. I particularly like the option to use subfolders etc, but as I use my own system of folders and subfolders (for example I have separate subfolders for skins, eyes and characters), I see no use in a merchant using them as it makes things far more difficult to organise. So my personal preference is a simple placement, but with a recognisable name (!! a file like EH_JGWITF, or a "readme" without clue are a real horrorshow). Also, don't use fc2 or so to replace pz2 files as expressions (faces) are overwritten by a pz2 that is added later on! In case of something special (magnets...) mention this clearly in the readme_myItem. In case the bump in P5 nodes isn't connected, mention this in the readme. If you don't have P5 yourself, work with a beta tester. Just my three eurocents.

I have tried prudent planning long enough. From now I'll be mad. (Rumi)