Two down, three to go.
Most of the music in Crisis Core is just arrangements of tracks from Final Fantasy VII. I got to the part where Zack first meets Aerith (yes, she's officially "Aerith" now) and the arrangement of Aerith's Theme is actually very nice. It stood out to me because it's an arrangement on guitar which is not something I had heard before. I decided to upload it for anyone else who might be into that sort of thing. (Probably only me, but oh well.)
A Flower Blooming in the Slum (from Aerith's Theme)