To use NVR with AWOP ...

1 ) install FCO v2.3.1 (from FCO's Old Files area) selecting *none* of the options
2 ) disable the FCOMaster.esm file  ( better to delete it )
3 ) install NVR 3
4 ) install AWOP
5 ) install AWOP's patch for NVR 3 via its "AWOP Compatibility Patches"
6 ) set bLoadFaceGenHeadEGTFiles=1 in all three game .ini files  ( see instructions below )
7 ) use a mod manager to toggle Archive Invalidation off and then on again


These steps also work fine:

1 ) install FCO v2.3.1 (from FCO's Old Files area) selecting *none* of the options
2 ) disable the FCOMaster.esm file  ( better to delete it 
3 ) install NVR 3
4 ) install MMUE
5 ) install MMUE's patch for NVR 3 via its "New Vegas Redesigned 3 - Compatibility Patch"
6 ) set bLoadFaceGenHeadEGTFiles=1 in all three game .ini files  ( see instructions below )
7 ) use a mod manager to toggle Archive Invalidation off and then on again


And also these steps as well:

1 ) install FCO v2.3.1 (from FCO's Old Files area) selecting *none* of the options
2 ) disable the FCOMaster.esm file  ( better to delete it )
3 ) install NVR 3
4 ) install MMUE
5 ) install MMUE's patch for NVR 3 via its "New Vegas Redesigned 3 - Compatibility Patch"
6 ) install AWOP
7 ) install AWOP's patch for NVR 3 via its "AWOP Compatibility Patches"
8 ) set bLoadFaceGenHeadEGTFiles=1 in all three game .ini files  ( see instructions below )
9 ) use a mod manager to toggle Archive Invalidation off and then on again