Riding a PC Issues

[The Fifth Elephant]

from here: http://enworld.cyberstreet.com/showthread.php?s=&threadid=36896

Saddle Up: Mounted Combat Rules for Intelligent Characters, by Rich Redman. Covers training an intelligent creature to be a mount, the number of riders, placing mount and rider on a combat grid, initiative, attacks of opportunity, how special attacks are affected, how the Mounted Combat feat affects mount and rider, and summarizes the mounted combat rules from the PHB with necessary changes.

This is referring to Dragon #304