The Dream Theater Tribute is composed of 2 parts,
the second part being When Dream and Horn Unite
It is made of themes from almost each album of their discography (including the live ones).
Interesting (and pretty cool) fact :
during the Progressive Nation 2009 tour, Part 1 was played entirely right before the band hit the stage :).

Tracklist : PART I

– Metropolis Part II theme
– The Test That Stumped Them All
– The Dance Of Eternity
– War Inside My Head ( Live Version )
– The Test That Stumped Them All
– Home
– The Root Of All Evil
– Erotomania
– This Dying Soul
– A Change Of Seasons
– Metropolis Pt1
– Peruvian Skies
– Ytse Jam
– Stream Of Consciousness
– Erotomania
– Pull Me Under/New Millenium
– In The Name Of God
– Vacant
– When The Water Breaks
– Octavarium
– Grand Finale
(+ When The Water Breaks)

Tracklist : WHEN DREAM AND HORN UNITE

– Overture
– Wait For Sleep
– Overture 1928
– Fatal Tragedy / Endless Sacrifice
– Repentance
– A Change of Seasons
– In The Presence of Enemies
– Constant Motion
– Take The Time
– When The Water Breaks
– The Count of Tuscany
– Anna Lee
– Beyond This Life
– Sacrificed Sons
– Learning To Live
– The Ministry of Lost Souls
– Prophets of War
– Fatal Tragedy
– The Glass Prison
– Just Let Me Breathe
– The Glass Prison
– A Fortune In Lies

French Horn, Trumpet and Trombone Covers of specific Dream Theater Songs