Create Marker (Ctrl+M at the Green Wiper position) at the beginning of each songs.
When you click on the Marker within Track Overview Window (Shift+T), the beginning of the Marker until next Marker is selected so you can "Copy Selection to New Sequence" from Track Overview Sequence popup menu.
Prefix numeric ID to Sequence name will benefits sorting down the load.
Activate the newly created Sequence from the Track Overview Sequence Selector (but not from Chunk Window to avoid confusion) and verify the sequence can be played without any problem.
Now select all Sequences but the first song, which should be play-enabled as shown in the Chunk Window.
From Chunk Window Mini Menu, select Delete so all but the first Sequences will be deleted. DO NOT SAVE!
Next step is to make sound file smaller for housekeeping.
Open Soundbite Window (Shift+B) and do "Select Unused Soundbites so all the Soundbites except ones needed for the first Sequence are selected.
Remove Unused Soundbites from the list. DO NOT SELECT DELETE! DO NOT SAVE!
And of course make sure the Sequence still plays as expected. DO NOT SAVE!
File menu > SaveAs: Give a meaningful numbering. Remember that OSX is Unix. Even Mac might allow illegal characters, it is a better practice to not to use period, and use UNDERSCORE for string separation.
Select Duplicate Audio Data option so the new DP Project file is self-contain, which can be backed up as a song without depending the original Project file/directory.