It's worth noting that the Terminal command mentioned in the article you linked to—
defaults write com.apple.iTunes full-window -1
—and that provided by Ira in the opening post of this thread—
defaults write com.apple.iTunes full-window -boolean YES
—are functionally identical. That is, the -boolean option in Ira's version simply allows the user to substitute YES or TRUE for the integer value 1 in the 'Hints version, and NO or FALSE for the integer value 0.
See Specifying value types for preference keys under man defaults for more.