I need some help here, could someone please help me ID the following?

SAC, First Season, Episode 10 --- 07:00 (the chorus)
SAC, First Season, Episode 11 --- 19:57 (the chorus)
SAC, First Season, Episode 13 --- 11:28 (the soft music (it lasts until 12:41))
SAC, First Season, Episode 17 --- 13:30 (the song with the soft voices and acoustic guitar)
SAC, First Season, Episode 18 --- 09:31 and 16:15 and finally 21:00 (the chorus again)

Most of this songs are chorus, but I have NEVER EVER found them on any of soundtracks... any ideas?

Never mind... I found them on the Unofficial Collection by kacper (Thread 44707).

Thanks anyway (shame I can't find them with the music alone).