You must be planning on taking him barefoot if you are gonna get Pete's dvd set. He has some articles on his site worth reading.......and then reading again......and again.
Here's a quick link Pete Ramey writes about white line disease thrush navicular disease hoof balance
This is another barefoot site which I like. Bare Foot Horse
This site is worth reading over and over again. In fact I would suggest you start with your reading on this site before you begin reading Pete's articles. That way the articles at Pete's site will make more sense to you.
If you watch tv then give it up for a week or two and become a sponge and read everything from those two sites.
There's nothing too serious I see on those hooves. Just the average of what happens in shoes, and a trim that isn't done in a way that allows the hoof to grow and function as it should. There's quite a bit of flaring going on in the fronts, especially at the toes. Get the breakover back on those toes and keep the hoof wall nice and rolled on a consistent basis and the hoof will grow to the nice round shape it should be.
On the backs you could roll the walls right now because there are no shoes on em. The hoof walls need a good rolling, and as they are right now it's encouraging flaring and keeping those cracks around. Roll those walls and all of that will go away. And remember to roll the walls ALL the way around the hoof wall, not just at the toes, but all the way around the hoof.
As for the heels.............
Sorry, but I'm just pulling a blank on the proper name for the crack/valley that runs along the frog. So I'm just gonna call it the valley for now. Rasp the heels to just above the living sole plane. Like an 1/8" - 1/4" above it. But you also need to keep the rasp parallel to the valley that runs along the frog. You can see that the depth of the valley near the heels are very deep and up near the tip of the frog is shallow. You need to keep your rasp parallel to that valley and the heels will get back in line to where they should be.