There are ways to go even deeper. For instance, if you're like me, the "Type" that was listed in detail view of a folder may show "Photoshop.Image.20." If that is what it shows for JPG and another type like PSD or PNG, when you try to sort by type it will lump them all together. Please note that big downside to editing the registry, besides possibly corrupting it, is that any future updates to Windows or Photoshop may not know to resolve the issue because you could be making changes to stuff it doesn't know to look for because it'll be custom. If that's scary, and I can completely understand why, remember you can always backup your registry, which you should always do before making changes. Here is a simple way to sort by "Type" in this situation. Include "File extension" detail in your folder. Then you can sort by that. It adds another column, but it's at least registry independent and looks at the extension of the file.
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