There is a proper OST for it.
1 Labyrinth of Forgotten Time
2 Opening
3 Treasure Hunter's Theme / from FF9 "Hunter's Chance"
4 Stella Ranch / from FF7 "Farm Boy"
5 Ranch at Night / from FF4 "Rydia"
6 Town of Forgotten Time / from FF11 "Tarutaru Male"
7 Town at Night / from FF6 "Epitaph"
8 Shirma's Theme / from FF1 "Town"
9 A Memory Returned / from FF11 "Prelude"
10 Dungeon Hero X's Theme / from FF8 "The Man with the Machine Gun"
11 Airship Theme / from FF4 "Airship"
12 Memories of a Bygone Day / from FF5 "My Home, Sweet Home"
13 Memories of the World / from FF6 "The Fierce Battle"
14 Together Forever / from FF5 "The Day Will Come"
15 Mog House X / from FF3 "Theme of the Four Old Men"
16 Fragment of Memory / from FF9 "Over That Hill"
17 Nostalgia / from FF1 "Chaos' Temple"
18 Guardian of Flame 1 / from FF5 "Sealed Away"
19 Guardian of Water 2 / from FF5 "Dungeon (Fate in Haze)"
20 Guardian of Light 1 / from FF10 "Thunder Plains"
21 Guardian of Darkness 2 / from FF11 "Awakening"
22 Duel Room / from FF8 "Force Your Way"
23 Phoenix Battle / from FF3 "Battle 2"
24 Leviathan Battle / from FF4 "Battle with the Four Fiends (The Dreadful Battle)"
25 Alexander Battle / from FF10 "Summoned Beast Battle"
26 Croma Battle / from FF8 "Only a Plank Between One and Perdition"
27 Raffaello Battle / from FF5 "Clash on the Big Bridge"
28 Last Battle / from FF5 "The Decisive Battle"
29 Ending / from Chocobo Racing "The World's Tomorrow"
30 Pop-up Duel / from FF2 "Battle Scene 1"
31 Door Crawl / Theme Song
I uploaded it for you :
http://www.filefactory.com/file/246e9e/