TO INSTALL AND USE PRESETS:

Drop the entire folder called "Songbird" (NOT the folder called "Songbird v.x.x.x" but the one within it) into the folder called ".../ableton/user library/presets/instruments/max instrument". This is found in the "Places" section in Live's browser or in your finder/file browser. If you are going through finder (mac) the Ableton folder is typically in your "Music" folder. If you are going through your file browser (windows) it is typically in the "My Music" folder. 

So if you followed the above instructions correctly for the presets to load, the full path to the device file (the .amxd file) shoulde be:
.../ableton/user library/presets/instruments/max instrument/Songbird/Songbird.amxd