Reading the FAQ I just stumbled over this cool trick of Shift-clicking on the Name column of a folder display to have it sort the files by extension first, and then by name, even without displaying the Ext column. That's a really neat way to display the folder contents, but it looks like there's no way to save this particular format. In the FAQ it also says that this option cannot be accessed via the Folder Options dialog.
I'd love to be able to save this type of folder format for a folder and its subfolders. Can we have that option sometime in the future? Pretty please?