This boxed set contains the entire first season on three DVDs. Here is a FOX press release from early July about these DVDs:

Disc 1:
5 Episodes w/ Optional Commentary
Original Script: Bart the Genius
Original Script: Bart the General
Disc 2:
5 Episodes w/ Optional Commentary
Original Script: Moaning Lisa
Disc 3:
3 Episodes w/ Optional Commentary
Original Script: Some Enchanted Evening
Outtakes from Unaired Version of Some Enchanted Evening w/ Optional Commentary
Bart the General Animatic w/ Commentary
Albert Brooks Outtakes: Life on the Fast Lane
BBC Special "America's First Family"
ABC News Special Report on Bart T-shirt Controversy
Tracy Ullman Short: Good Night Simpsons
Foreign Language Clips (5)
Stills Gallery of Early Sketches
Easter Eggs