after uploading/upgrading to IDE 1.6.4 I was able to drag and drop the pitches.h file from explorer (windows 7) to the tabbed area. I found it also interesting that simply adding the pitches.h to my code did not increase the program storage space after compiling, however after i put in a tone(); line - the program storage space increased about 1.5k of space. The next thing I did was comment out "pitches.h" and in the tone line, used only numbers > tone(8, 440, 100); and this worked....
So all the header is doing is translating what we know of as the note to a frequency number, the actual work is being done in ..arduino\hardware\arduino\avr\cores\arduino\Tone.cpp