Ride, Animal Handling, and mounts in combat

[Shisumo]

The Ride Skill says:

Pathfinder Beta, pg 70 wrote:

Fight with Warhorse: If you direct your war-trained mount to attack in battle, you can still make your own attack or attacks normally.

Pathfinder Beta, pg 71 wrote:

Control Mount in Battle: As a move action, you can attempt to control a light horse, pony, heavy horse, or other mount not trained for combat riding while in battle. If you fail the Ride check, you can do nothing else in that round. You do not need to roll for warhorses or warponies.

The Animal Handling Skill says:

Pathfinder Beta, pg 64 wrote:

Combat Riding (DC 20): An animal trained to bear a rider into combat knows the tricks attack, come, deend, down, guard, and heel. [...] Warhorses and riding dogs are already trained to bear riders into combat, and they don't require any additional training for this purpose.

So here are my questions:

1) What is the actual list of creatures that come "combat ready?"

2) Does training a mount for the Combat Riding purpose via Animal Handling get you all the same benefits as being a warhorse (for the purposes of these skills, that is)? Can you ignore the Control Mount in Battle roll with such a mount? Direct it to attack?