Installation

Copy the DLCBattlehornCastle.esp file to the Oblivion Data folder.
Launch OblivionLauncher.exe
Select Data Files
Make sure that the DLCBattlehornCastle.esp checkbox is checked
Exit the Launcher
Launch Oblivion.exe
Play!

Copy DLCBattlehornCastle.bsa to your Data folder as well, this file won't show up in the launcher Data Files list, but that's okay!

Prerequisites:
Battlehorn Castle
Shivering Isles
CM Partners
Knights of the Nine


Changelog
Version 1.0 (ALPHA!)
Fixed AI bugs
Fixed Lord Kevyn's Chest
Other miscellaneous bugfixes and tweaks

Version 0.9 (BETA)
Miscellaneous bugfixes and tweaks
Cleaned up the mod a bit

Version 0.8 (BETA)
Even more bugfixes
Removed quite a few creature NPCs to kick down the amount of bugs, glitches, and otherwise
Other miscellaneous bugfixes and tweaks

Version 0.7 (BETA)
Lots and lots of bugfixes 
Removed Khajiit Knight, replaced with Ayleid Warrior, due to bugs, and changed some NPC placement in Battlehorn Castle
Added Minotaur Guard outside the Battlehorn Castle gate
Fixed Horses in Thunderfall Stables and Battlehorn Stables
Other miscellaneous bugfixes and tweaks

Version 0.6 (BETA)
Battlehorn Castle (WIP) (Additional Shadowbanish Wine) (Upgraded NPC AI)

Version 0.5 (BETA)
Battlehorn Castle (WIP) (3 New Knights to defend the castle! Fenrir (Superwolf), and 4 Generic Pet Wolves) (Rearmoured and Upgraded NPCs!)