Tes4Mod:Oscuro's Oblivion Overhaul/Merged Mods

Oscuro's Oblivion Overhaul is a massive mod. It changes a staggering amount of things in the world of Cyrodiil. These changes are bound to overlap with changes performed by other mods that also affect the same thing found in default Oblivion (overlaps do not occur with user made new things, like NPCS, Creatures, Lists, Dungeons, Quests, etc.). This means that you will have to ascertain what changes you are willing to let go should they overlap with OOO's changes. You can easily choose which change to keep by altering the load order of the mod. Altering the load order is very simple by using programs such as Wrye Bash.

In addition, you should consider the nature of the overlap itself. Many overlaps are not bad in any way. For example, some of the optional mods provided with OOO overlap with each other, but they will not cause any errors or deviations if they are used 
together. 

OOO already develops to great extent what some other popular levelled-list mods do. OOO has levelled list tweaks for items, creatures, NPCs, spells and so forth. In addition, OOO aims to create a balanced static world whereas most other mods that change default lists rely on and emphasize leveling features (leveling in this context means that content remains locked, veiled, unavailable to the player until he or she reaches a specific level). Unless you prefer another mod's changes, and you know exactly what you miss in the trade, you should be very cautious about using them with OOO.

OOO merges several popular mods to further enhance gameplay and achieve its true goals (see General Overview of Oscuro’s Oblivion Overhaul's Gameplay Vision below). Most of these mods are, to a lesser or greater extent, modified to fit better with OOO, and thus the original ones is either unnecessary or flat-out incompatible with OOO.

Merged Mods
These mods are merged into Oscuro's Oblivion Overhaul, and they will almost definitively conflict with OOO when used as stand-alone mods. If you have any of these, please remove them before installing OOO. If you do not, you will have to live with the incongruence of having items that look the same, but are found in radically different places with radically different stats and significance in the overall scheme of things. You may also lose significant integration features if you keep any of these active while using OOO (this is especially true for Harvest Containers, LockBash, and Security Rebalance).

Gameplay Mods
Combat Behavior by Lyrondor
Drop Lit Torches 1.6 by Frugal
Ebony Blade Fix by Dheer
Gem Dust by Turgothh (Modified to enhance Tamriel's Glittering Geology)
Geomancy by Momaw (Modified to enhance TGG)
Guild Item Ownership 1.2 by Tandem
Harvest [Containers] 0.99.08b by Dejunai
Independent Thievery Rebalance (Hard Setting) by AdelieDreams
Inebriation by Lap
LockBash 1.1 by Scruggsywuggsy the Ferret (modified to work with Lap's Security Rebalance)
Potions Recolored by DoofDilla + Better Potion Bottles by Ceano + Potable Pastiche by Daeger; the latter includes the following:
Better Blood Bottles for Vampires by Hero2014
Better Beer Bottles by Laurinque
Better Wine by MarkQuinn
Improved Potions of Exploration by Stabbey
Security Rebalance by Lap (modified to work with Scruggsywuggsy's LockBash)
Tamriel's Glittering Geology by Gristle and XMarksTheSpot

Item Mods
Archmage Armor by Axeface (2 sets)
Arctic Gear by Perditio44
Battledress 1.1 by Chiz (plus a full set of an OOO-only retexture: Dread Armor)
Blades Ceremonial Armor by Axeface
Capes and Cloaks 1.2 by Someone1074, textures by Belenos (special 1.3 versions: Elhoim and Praetorio)
Chain Bikini by Aleanne
CM Iron Battle Shields and Orcish Nobility Shield by Mark Quinn
Contessa Chromed/Queen Metalace by Eyren (2 sets)
Dark Glass (Obsidian) by Praetorio
Dark Rose by Kafeid
Defensive Staves by Kearsage
Draconic Armor by BadAndy
Ethereal: Imperial Legion Armor by DagothBalls
Ethereal: Imperial Legion Armor Re-Texture by Elhoim
Female Dwemer model by Mmmpld
Femme-Daedric armor by Vagabond Angel
Gray Fox Armory by Daeger
Griffin Armor by Phitt
Growlf’s Female Armor by Growlf (4 sets)
Ivory Armor by Sleeper25
More Shields by Zynthar (4 shields)
New Daedric retexture by Praetorio
Noble Plate by Ulath
Pegasus Armor by Gorgonzola3000
Shadowmail Armor by NorrabMaster
Silver Dragon Armor by The Atronach
Sin's Light Armor Pack 3.0 by Sin (9 sets)
Tegeal's Extra Robes by Tegeal (15 sets)
Tornes' Blockade Shield by Praetorio
Vermillion and Silverthorn robes by Kafeid (2 sets)
Vella's Armor by vine-au (2 sets)
White Rose by Kafeid
Worn Armors by Dieterweb (8 sets + 10 cuirasses)

Weapon Mods
Arctic Bow by Perditio44
Art of War Weapons 1.1 by RDjeke
Braided Weapons by Chiz
Cutlasses by The AshLad
Dark Rose weapons by Kafeid
Elven Sabres and Bows by Adonnay
Icxth Sword by ThrottleKitty
Jounk’s Polearms by Jounk33 (Translation by Katan)
Maulers by TemplarGFX
Meteoric Weapons by Madcat and RDJeke
Noble Weapons by Ulath
Offensive Staves by Kearsage
Pegasus Weapons by Gorgonzola3000
Rapiers by Cethegus
Real Umbra by Razhkul (original model and texture by Oriphier)
Scimitars by Winter
Scythe Mod by Thomas "tda" Bramall
Severian's Katanas by Severian
Shadowmail Weapons by NorrabMaster
Silver Dragon Weapons by The Atronarch
Soul Wail by Praetorio
Two-handed maces by Rdjeke
VADaito by VagabondAngel
Vella Glass Bow by Au-vine
White Rose weapons by Kafeid

Other Mods
Leviathan's Soul Gems by Star Boi
Spell Icon Replace 1.0 by Forsaken32

General Information
Items statistics, names, owners, spell-effects, and values have changed drastically from how things were in the original stand-alone mods. You will not find them lying around in a chest in the middle of a plaza, or for sale at your local store. All items have new special owners, stories, resting places and meaning within the global design of Oscuro's Oblivion Overhaul.

Item statistics are all redesigned to take into account every other included item. This was done to achieve balance across every single new item addition. It also serves one of the main goals of the mod: to make the world more static, varied, balanced and unique all at once.

Notable Known (In)compatibilities
Unofficial Oblivion Patch
Oscuro's Oblivion Overhaul merges parts of Unofficial Oblivion Patch 2.1 where overlaps occur. If a newer version of UOP is released, there should be no problems using that – just make sure to load UOP before OOO.

Player House Markers
OOO adds player house markers. These will be revealed when you purchase a home. Many other house markers mods will conflict with OOO's changes to prices of the homes. Now you do not need to use those mods to get your house markers.

Knights of the Nine and other DLCs
The official plugin Knights of the Nine must be loaded after OOO. The rest of the official plugins should work properly with OOO.

Shivering Isles
OOO does not yet change anything in Shivering Isles, except for any leveled lists SI might use from default Oblivion. Shivering Isles will work perfectly together with OOO.

General
OOO will almost definitively conflict with mods that change a lot of NPCs or leveled lists, including NPC New Clothes by emyung and RealSwords by waalx. Compatibility patches can be found for many mods to make them compatible with OOO. See here for a full list.