La Confrérie des Traducteurs

3) Riding for followers -- 8 follower horses can be found at major cities and stables around Skyrim for followers to ride.
Gear for horses can be bought at Whiterun Stable.
From Skulvar at Whiterun stable you can buy:
-- [Horse Tack] Basic Gear -- When placed in UFO horse inventory: UFO Horse will follow you while you are mounted, fast travel after you while you are mounted. Followers will port ahead and horses will come after you wait for 1h. Price: 1000 gold
-- [Horse Tack] Martingale -- When placed in UFO horse Inventory: UFO Horse will wait in place when dismounted. Used to leave horses at desired locations. Price: 200 gold
-- [Horse] Interact -- Also you can get training in horse handling. This will add "[Horse] Interact" item to your inventory. Equip it in hand and use on UFO horse. This will open UFO horse Inventory. Price: 500 gold [As of 1.2g works on players horse too.]
UFO horses with no Horse Tackle will go back to location you found them once dismounted.
-- While mounted--
Follower and horse will fast travel with player [with 1.6 followers will fast travel ahead of horses, waiting 1h will port horses to your location. being worked on atm to restore old functionality.]
Follower horses will follow the lead horse when ridden by player (allows you to relocate horses)
Followers will not engage in combat unless player is attacked
Using Relax Voice Command 2x(twice) will command followers to dismount (should you not wish to wait for them to dismount on their own)
--Not mounted--
Follower horses will not fast travel
Follower Horses will stay on location where they were dismounted by follower