I've oftened wondered the same thing. I'm feeling ambitious tonight so I'll take this time to post (to the best of my knowledge) the various exercises used for each body part for PS, MIS, CTX and BodyMax. I wont be including the number of reps or counts etc...I'm not THAT ambitious!!
CHEST
PS: Pushups, Barbell chest press, Barbell Incline chest press, Dumbell Incline chest press, Dumbell Chest fly, Superset Fly-Press
MIS: Pushups, Barbell Chest press, Dumbell Chest Fly
CTX: Barbell Chest press, Superset Fly-Press, Pushups
BMx: Dumbell Chest press, Barbell chest press, Pushups
BACK
PS: T-bar Row, Bent over barbell row, One-arm rows, Shrugs
MIS: One-arm rows, Barbell bent row, Reverse Fly
CTX: Barbell Bent rows, Close Grip Bent rows, One-arm rows, Quarter dead lifts
BMx: One-arm rows, Wide grip barbell rows, Rear delt flys
SHOULDERS
PS: Arnold press, Seated Clean&Press, Side lateral raise, Reverse Fly, Seated bent arm side lateral raises
MIS: Upright row, Barbell overhead press, Bent arm side lateral raise
CTX: Overhead press, Bent arm side lateral, Giant set side-back-front raise, Bent shrugs, Overhead press
BMx: Dumbell military press, Upright row, Side Lateral raise
BICEPS
PS: Barbell curl, Alternating Hammer curls, Negative Barbell curls, Concentration curls
MIS: Crazy 8's, Simultaneous Hammer curls, Rotation curls
CTX: Crazy 8's, Alternating bicep curls, Rotation curls, Concentration curls
BMx: Barbell curls, Alternating Hammer curls, Crazy 8's, Rotation curls
TRICEPS
PS: Close grip dumbell presses, Dumbell french press, Crossbody kickback, Dumbell french press, Dips
MIS: Barbell french press, Close Grip Barbell press, Dips, Kickbacks
CTX: Close grip barbell press, Lying french press, Superset standing french/overhead press-kickback, tricep pushups
BMx: Barbell close grip press, Lying overhead extension, Dips, Crossbody kickbacks
Sorry for any errors! Hope this helps somebody out there!!
Stacy