So I've attempted to match each expanded IM to a musical score, with the aim of developing understanding of the theory outlined here. Try to pay attention not so much to the lyrics (but they can also be relevant if present), but to the overall vibe that the song transmits. I've tried to get examples as "pure" as possible (since most music is a combination of various IM's at the same time). Remember that:

+Fi - Delta Fi
-Fi - Gamma Fi

+Fe - Beta Fe
-Fe - Alpha Fe

+Ti - Beta Ti
-Ti - Alpha Ti

+Te - Delta Te
-Te - Gamma Te

+Se - Gamma Se
-Se - Beta Se

+Ni - Gamma Ni
-Ni - Beta Ni

+Ne - Alpha Ne
-Ne - Delta Ne

+Si - Alpha Si
-Si - Delta Si

And they are combined in the following manner (meaning the IM is actually a combination of both +/-, introverted/extroverted elements, and neighboring quadras share/value the combined element, although giving precedence (normally) to the valued particular expanded IM).

Code:
-Se/+Si
+Se/-Si
-Te/+Ti
+Te/-Ti
-Ni/+Ne
+Ni/-Ne
-Fe/+Fi
+Fe/-Fi