If anyone saw my other thread, I recently discovered that QE puts most of its songs in the credits. Your description is kind of vague, but I can list the songs from 4e03 "Ed Miller."
"Oceans 99"
Written and performed by Kevin Holmes and Jonathan Miller
"The Highballer" and "Cha Cha Cheese"
Written and performed by Kevin Holmes and Ian Gibson
"It's My Bag Baby"
Written and performed by Kevin Holmes
"Fizzle No. 7"
Written and performed by Kevin Holmes and Dana Nielsen
"The Question"
Written and performed by Ian Nieman
"Dance Trip"
Written and performed by Ian Nieman
Although I have now identified the song "Happily Ever After" by Addicted2Fiction from 4e01, I'm still looking for some way to purchase this song... any help appreciated.
So how do I know what all the QE credits say? iTunes is your friend.

(I don't even have cable!)