BTW, has anyone actually tried putting "Her Majesty" into its original place between "Mean Mr. Mustard" and "Polythene Pam"? It sounds perfectly at home there, no matter what Paul McCartney says.
Simply inserting the track between the two others may not work - you may need to do a more precise waveform insertion in Adobe Audition. The original place where the tape is spliced can be easily seen.