Can someone explain the new moon soundtrack and how it fits in ?

I don't really understand the question. It doesn't really make sense.

The New Moon soundtrack, or any soundtack, for that matter, is a collection of lyrical songs that sort of fit with the scene it's put with.

I'll use Meet Me on the Equinox, sa pamamagitan ng Death Cab for Cutie, for an example since it's the "main" song for New Moon just like "Decode" was for Twilight. Meet Me on the Equinoxwas put in the credits at the end of the movie. If you listen closely to the words, you'll understand that the lyrics say what the movie is about. I'm not going to go through every single song, but I'll give an example of what I mean...

An excerpt of the lyrics:

Meet me on the Equinox
Meet me half way
When the sun is perched at it's highest peek
In the middle of the day

Let me give my pag-ibig to you
Let me take your hand
As we walk in the dimming light
Or darling understand

That everything, everything ends

"When the sun is perched at it's highest peek
In the middle of the day" is signifying the clock tower in Italy. It's noon hence the "middle of the day". Bella is trying to meet Edward there to tell him that she's alive. To meet him halfway.

Some of the songs on the New Moon Soundtrack weren't as fitting, but then again, some were. Some songs were placed in weird positions like Muse's I Belong to You, but that's okay.

Hope this answered your tanong :)

1."Meet Me on the Equinox" sa pamamagitan ng Death Cab for Cutie Credits 3:44
2 "Friends" sa pamamagitan ng Band of Skulls Bella rides a motorcycle with a stranger 3:09
3 "Hearing Damage" sa pamamagitan ng Thom Yorke Victoria escapes the lobo pack 5:04
4 "Possibility" sa pamamagitan ng Lykke Li Bella sits and thinks while months go sa pamamagitan ng 5:06
5 "A White Demon pag-ibig Song" sa pamamagitan ng The Killers Credits 3:34
6 "Satellite Heart" sa pamamagitan ng Anya marina Edward drives Bella tahanan after her birthday party 3:33
7 "I Belong to You" [New Moon Remix] sa pamamagitan ng paraluman Bella and Jessica go to the pelikula 3:12
8 "Rosyln" sa pamamagitan ng Bon Iver and St. Vincent Edward breaks up with Bella 4:49
9 "Done All Wrong" sa pamamagitan ng Black Rebel Motorcycle Club Members from the lobo pack take Bella to Emily's house 2:49
10 "Monsters" sa pamamagitan ng Hurricane Bells Edward arrives at school 3:16
11 "The kulay-lila Hour" sa pamamagitan ng Sea lobo Bella's birthday party 3:32
12 "Shooting the Moon" sa pamamagitan ng OK Go Bella and Jacob spend time in his garahe 3:18
13 "Slow Life" sa pamamagitan ng Grizzly madala featuring Victoria Legrand Bella underwater after she jumps off the cliff 4:21
14 "No Sound But the Wind" sa pamamagitan ng Editors Edward drives Bella tahanan from the Cullens' house after the vote 3:48
15 "New Moon (The Meadow)" sa pamamagitan ng Alexandre Desplat
16 "Solar Midnite" sa pamamagitan ng Lupe Fiasco[20] - Bella, Jacob and Mike at the pelikula
17 "All I Believe In" sa pamamagitan ng The Magic Numbers - Bella and Jacob fixing mga motorsiklo
18 "Die Fledermaus" - Duettino: Ach, ich darf nicht hin zu dir" sa pamamagitan ng APM Orchestra[20] - Edward, Bella, Alice, and Jane in an elevator