IF you have your DAModManager (DAMM) already installed and working correctly, you can skip this step.
If you have dropped the NBAIO.override file into DA Modmanager in the Installed DAzip's box of DAModManager, UNINSTALL IT. IF you have tried installing this file in DA Modder,UNINSTALL IT. IF you have already placed the 7z or overrride file into your documents/bioware/dragon age/packages/core/overrides folder DELETE IT. So if you run into this problem, reconfigure the body parts to use parts from all one body. Note: Mismatched Textures - if you try to mix and match body parts in the newer versions of this mod,the colors won't match.
Ok, there's been a lot of folks that have been having problems installing this Override, so here's my tutorial on how to do it, and trying to cover some of the issues that folks have been having.