Since there was no documentation for the new 1.69 Ride skill, various feats and the PDK prestige class I went in game and copied down all the details for everyone's convenience. I also tossed in an undocumented feat (Great Smiting) from HotU that Elessar pointed out to me. Thanks Elessar!
Ride (Skill)
Ability: Dexterity
Requires Training: No
Classes: All
The character has spent time training to use a horse in combat, and can perform actions unskilled people cannot.
Note: Horses and the Ride skill are only used in the Premium Module "Neverwinter Nights - Wyvern Crown of Cormyr" and specific community made modules.
Great Smiting (Feat)
Type of Feat: Class
Prerequisite: 21st level, Charisma 25+, Smite Good or Smite Evil
Specifics: Whenever a character makes a successful smite attack, it adds two times the characters level to damage. This feat may be taken multiple times, up to a maximum or 10 times - each time adding additional damage equal to the character's level to the smite attack.
Use: Combat Mode
Mount Actions (Feat)
Type of Feat: General
Prerequisite: None
Specifics: This series of actions enables players to interact with their mounts.
Use: Automatic
Mounted Archery (Feat)
Type of Feat: General
Prerequisite: Ride 1 rank, Mounted Combat
Specifics: The attack penalty for using a bow while mounted is reduced from -4 to -2.
Use: Automatic
Mounted Combat (Feat)
Type of Feat: General
Prerequisite: Ride 1 rank
Required for: Mounted Archery
Specifics: While mounted, once per round you will attempt a Ride check to increase your Armor Class by 1 point for every 5 of the check result.
Use: Automatic
Summon Mount (Feat)
Type of Feat: Class
Prerequisite: Paladin
Specifics: Summons to the paladin a faithful, magical beat - a warhorse mount. The beast is more powerful as the paladin gets more powerful.
Note: Horses and the Ride skill are only used in the Premium Module "Neverwinter Nights - Wyvern Crown of Cormyr" and specific community made modules.
Use: Selected
Purple Dragon Knight (Prestige Class)
The famous Purple Dragons of Cormyr are regarded across Faerûn as exemplars of disciplined, skilled, loyal soldiers. Their reputation is deserved partly because of the heroic actions of their leaders, the Purple Dragon knights.
Purple Dragon knights develop uncanny skills related to coordinating and leading soldiers. Most are fighters, rangers, or paladins, but a few bards, clerics, and rogues have been known to become Purple Dragon knights. Sorcerers and wizards tend to join the War Wizards, Cormyr's elite brigade of fighting spellcasters, while barbarians are too undisciplined, and druids and monks too "uncivilized" in Cormyr to enter this career.
Hit Die: d10
Proficiencies: A purple dragon knight gains no additional proficiencies.
Skill Points at Each Level: 2 + int modifyer
Class Skills: Craft Armor, Craft Trap, Craft Weapon, Discipline, Intimidate, Lore, Persuade, Ride
Requirements
Alignment: Non-Evil and Non-Chaotic
Base Attack Bonus: +4
Feats: Mounted Combat (requires Ride 1)
Skills: Intimidate 1 rank, Listen 2 ranks, Persuade 1 rank, Ride 2 ranks, Spot 2 ranks
Abilities
Level
1: Rallying Cry - +1 Attack Bonus to all allies within 60 feet, can be used three times a day.
Heroic Shield - Able to defend an ally, granting them a +4 armor class bonus for one round.
2: Inspire Courage - +2 saves vs. mind affecting, and +1 attack and damage, useable once per day.
3: Fear - As fear spell, useable once per day.
4: Inspire Courage - Can now be used twice a day.
Oath of Wrath - +2 bonus to attack, damage, saves and skill vs. single enemy.
5: Final Stand - +2d10 HP to a number of allies equal to Purple Dragon Knight level + Charisma bonus, once per day.
Rallying Cry (Feat)
Type of Feat: Class
Prerequisite: Purple Dragon Knight level 1.
Specifics: Three times per day, a Purple Dragon Knight can utter a powerful shout that gives all allies a +1 bonus to attack and a 20% bonus to land speed for one round.
Use: Selected
Heroic Shield (Feat)
Type of Feat: Class
Prerequisite: Purple Dragon Knight level 1.
Specifics: You may aid an ally, giving them a +4 bonus to their armor class for one round.
Use: Selected
Inspire Courage (Feat)
Type of Feat: Class
Prerequisite: Purple Dragon Knight level 2.
Specifics: Once per day, the Purple Dragon Knight can inspire his troops in combat. All affected creatures gain a +1 bonus to Attack and Damage, and a +2 bonus against mind affecting spells.
These bonuses last for 10 rounds.
Use: Selected
Fear (Feat)
Type of Feat: Class
Prerequisite: Purple Dragon Knight level 3.
Specifics: Once per day, the Purple Dragon Knight can cast the Fear spell with a caster level equal to his character level.
Use: Selected
Oath of Wrath (Feat)
Type of Feat: Class
Prerequisite: Purple Dragon Knight level 4.
Specifics: Once a day, the Purple Dragon Knight may swear to defeat a single opponent. He gains a +2 bonus to Attack, Damage, Saves, and Skills vs. that opponent. This lasts for a number of rounds equal to twice his class level.
Use: Selected
Final Stand (Feat)
Type of Feat: Class
Prerequisite: Purple Dragon Knight level 5.
Specifics: Once a day, the Purple Dragon Knight can inspire his troops to a heroic effort. Each ally in the area gains 2d10 hitpoints. This ability can affect a number of people equal to his Purple Dragon Knight level + Charisma modifier, and lasts for the same number of rounds.
Use: Selected