The DVD set, as released through Playsims Publishing at Flightstore, contains a smattering of variants from several different individual Warbirdsim products:
P-51D-15-NA "The Millie G"
P-51D-15-NA "Baby Duck"
P-51D-20-NA "Big Beautiful Doll"
P-51D-25-NA "The Enchantress"
P-51D-5-NA "Donald Duck"
P-51D-5-NA "Cripes A' Mighty 3rd"
P-51D-5-NA "Lou IV/Athelene"
P-51D-5-NA "The Comet"
P-51D-30-NA "Happy Jack's Go Buggy"
F-6D-25-NT "Lil' Margaret"
P-51K-10NT "Fragile But Agile"
P-51D-25NT "NACA 127"
P-51D-20NA "Jumpin Jacques"
P-51D-25NA "USAF FF-704"
Cavalier Mk.II "It's About Time"
P-51D-25NA "Moose/Candyman"
P-51B "Ding Hao!"
P-51B "Old Crow"
P-51C "Princess Elizabeth"
Mustang Mk.III "133 Sqdn"
There are four from each; "Little Friends", "Little Friends II", "Restored Part 1", "Restored Part 2", and "Fighter Leader X". Part of the deal however, for this DVD set, was that each model and texture set included was to be gone through and tweaked/updated to a matching standard across all of the variants. The work that went into this was done quite a number of years ago, but after the individual downloadable Warbirdsim addons had already been available for quite a while. As I recall, all of the cockpit textures, exterior textures, pilot model and prop blades were updated from when they had originally been made for the individual downloadable Warbirdsim products. The one P-51K included, "Fragile but Agile", is a depiction of a restored example flying today and does have the Aeroproducts propeller blades and spinner (the only things externally that separated a P-51K from a P-51D).
For the P-51B/C's, they received updates to the gunsight reticle, prop spinner, propellers, exhaust stacks, landing gear, pilot, drop tanks and drop tank racks. As a result of all of those updates, two new textures were created for the P-51B/C's called "P-51_FSX" and "P-51_FSX_Spec" to cover the updated parts. If you'd like, I can provide a .psd template file for the P-51B/C "P-51_FSX" and "P-51_FSX_Spec" textures so that you can create the proper prop spinner texture to match repaints you've added, or if you can let me know which P-51B/C repaints you have added, I can create/provide the required textures to match.