It came with Dawn of MANA (PS2) preorder.

http://www.megaupload.com/?d=TDDD263J

Breath of MANA

Composed by Kenji Ito

1) Breath of MANA
2) Prologue: Mana, Earth, and Spirits
3) Memorable Moment
4) Burning Spirits
5) Rising Sun (piano solo ver.)

Is it the soundtrack to Dawn of Mana or an actual game?

It is like the Legend of Mana and Crono Cross sampler cd's that were given out for pre-ordering. That's all you get, about five sample songs from that particular game. :)