Windows – How to make Windows 7 show all column headings the same for all folders

You can add extra columns in the 'Details' view in one music folder and then set that as the default for all music folders via the 'Folder Options' dialog ('Organise > Folder and search options > View' and click 'Apply to folders').
Win 7 is clever enough to only apply this view to other music folders.

Not quite one step, but if you go into Details view you can right click on the header and get a context menu.

By default "Date" is checked, but "Date Created" and "Date Modified" are present but unchecked. So uncheck "Date" and check "Date Modified".

This will apply to all the pictures folders.

I think the "Date" as "Date Created" only applies to the Pictures library. My Documents library has "Date Modified". Perhaps the thinking is that most users won't be editing their photos so sorting by date modified would be the same as date created. However, as I don't work for Microsoft that's pure speculation.