Didn't see this thread earlier & been busy. How's your horse now? How are you feeding & managing him? How have you been treating him? In addition to other's links, Equine Cushing's and Insulin Resistance Information
& hoofrehab.com are good places to learn from.
From as much as the xrays show, your horse doesn't appear to have bad feet. Quite long at the toe that wouldn't help though. Hopefully this hasn't been an ongoing issue & there aren't yet serious mechanical changes to his feet from it. Laminitis is inflammation of the coronary corium, can be a range of causes but commonly diet related. If inflammation is major or ongoing for long, can do major damage to the laminae - connective tissue between horn & inner hoof - but if caught quickly & managed well, it *shouldn't*(there are always exceptions) cause major hoof issues.
1st aid would include cold hosing/icing his feet to reduce inflammation, soft bedding, no high-carb feed, which *may* include rich grass hay. Vet & farrier/trimmer experienced in dealing with laminitis are important ASAP too. Protecting the feet, with foam, boots, whatever, may be important to allow the horse *comfortable* movement. Exercise is important after the 'attack' has subsided *so long as the horse is comfortable & feet are managed so no further damage will be done - eg. trimmed to relieve leverage from long toes, etc.
If you would like to post hoof & horse pics, see link in my signature for tips & we can give further advice on them & more info you provide.