HOTFIX: 4.0.2: Only available at the Nexus site. Note: Any faster will take unnecessary resources from the game and make the followers dismount robotically. Also Followers now very responsive and will mount / dismount their steeds within 2 seconds. Better Follower Improvements is no longer needed.
Horses For Followers is now a standalone mod. Sorry about that! Corrected since version 3.5+ A dedicated Horse Call mod (players horse) is recommended. The followers horse will track the player's horse to prevent them from getting lost.
Just mount your own horse and your companion will mount theirs. You can buy them from any of the city stables. Followers & hirelings can ride horses instead of running behind.