Si chat peut aider-OCO will work together with any mod that doesn't touch race data or NPCs. If it adjusts race stats it's not compatible. If it adds hairstyles or eyes to vanilla races it's not compatible. Either uninstall the conflicting mod or load OCO's ESP after it in the load order.
-Always install OCO after body replacers and character related texture mods.
-Use Oblivion Mod Manager's Archive Invalidation after installing to force the game to use OCO assets if things aren't showing up correctly.
-If in doubt, redownload and reinstall the mod manually. During Nexus instability the downloaded archives seem to get messed up sometimes. If the file fails to download it's a site issue and I can't do anything about it.
-You are solely responsible for your own game's stability. Read up on what the mods you're installing actually do and only add one mod at a time, testing your game immediately before adding another.
-If your issue persists after all of these there isn't much else I can tell you to do. Checking for conflicting mods, reinstalling OCO and running Archive Invalidation almost always solves issues.
IF YOU'RE USING A NON-ENGLISH COPY OF OBLIVION AND EXPERIENCE MUTE NPCS:
zilav pointed out a way to fix this.
"Those who want to translate OCO to their language:
1) download the latest version of TES4Edit
2) create a new text file with .pas extension inside Edit Scripts subfolder, copy paste this script
3) load OCO in TES4Edit, right click on it, select Apply script, chose file you created in dropdown list, click OK.
This will restore names in OCO from master file(s) in your language (Oblivion.esm)."
