Huh, I don't have the OOO esm, that's odd. But I do know it's MMM because when I disable them, OB works. So yeah, it's a conflict with that.

MMM has a Mart's Monster Mod for OOO.esp file that is dependent on OOO.esm being installed.

That's a big part of why you need to have version 1.33 of OOO installed first. The versions have to match.

If your package doesn't have an OOO.esm file, then you probably have version 1.3 or 1.31 and need to download the complete new package of OOO 1.33

Oky doky, I'll do that tomorrow.

Yay, it works now!

seems your problem was that missing OOO.esm. glad to hear it works now

I'm glad it works now too. OOO by itself is awesome, but combine it with MMM and you've got one hell of a game. What other epic mods should I add?