I got this from amazon.com. Don't know how accurate it is....
Disc 1: X-Men 1.5
Disc One: Widescreen full length feature, Enhanced Viewing Mode containing 6 deleted scenes and 17 behind-the scenes featurettes; Commentary by Director Bryan Singer
Disc 2: X-Men 1.5 VAM
Disc Two: Introduction by Bryan Singer, The Uncanny Suspects Casting Featurette, X-Factor: The Look of the X-Men Costume Featurette, The Special Effects of the X-Men Featurette, Storyboard-to-Animatic-to-Film Comparisons, Reflection of the X-Men Publicity Featurette, Exclusive Movie Premiere Footage From Ellis Island and around the world, Multi-Angle Scene Studies, Still Photo Gallery, 3 Theatrical Trailers, 14 TV Spots, 12 Web Interstitials, X-Men 2 Sneak Preview, Daredevil teaser
Disc 3: X2: X-Men United
Disc Three: Wide Screen Full Length Feature, Commentary by Brian Singer and Tom Sigel, Commentary by Lauren Schuler Donner, Ralph Winter, Michael Dougherty, Dan Harris, David Hayter
Disc 4: X2: X-Men United VAM
Disc Four: Documentary – “The Second Uncanny Issue of X-Men” – Making of X2, · 11 featurettes: “The Secret Orgin of X-Men”, “Nightcrawler Reborn”, “Evolution in the Details – Designing X2”, “United Colors of X”, “Wolverine Deathstrike Fight Rehearsal”, “Introducing the INCREDIBLE NIGHTCRAWLER!”, “Nightcrawler Stunt Rehearsal”, “Nightcrawler Time-lapse (branch from Make-Up), “FX2 – Visual Effects”, “Requiem for Mutants – The Score of X2”, “X2 Global Webcast Highlights”, 11 deleted scenes, Still Galleries, 3 theatrical trailers
Widescreen anamorphic format