Outlander
Custom Tags Are For Fags.
The New Vegas mod is re-recording all the audio for precisely that reason.
That is probably going to be one of this mod's weakest points (if they get it finished to begin with)
Unless the modder or the team has access to some good voice recording equipment and are able to find people who can actually voice act, and have experience doing so, the voice actor cast is going to consist of a lot of people using their headsets and perhaps the occasional better microphone to speak in the voices.
Doing voices well is quite a task and a challenge. I pretty much expect most of the voices to be devoid or drained of any emotion as the person is reading from the script in front of him/her, if not really exaggerating on it.
They should just release it without speech files altogether. Then 'someone' posts 'somewhere' a .txt explaining how to take the audio files from FNV and put them in F4NV. Easy peasy.