Apple today released QuickTime Player 7.6.6 for Mac OS X v10.6.3 which supports older media formats, such as QTVR, interactive QuickTime movies, and MIDI files on Snow Leopard. It also accepts QuickTime 7 Pro registration codes, which turn on QuickTime Pro functions.
QuickTime Player 7 will be installed in the Utilities folder in the Applications folder.
More info and download link here.