Does Efu uses a headpack? I tried searching for the answer but no avail. I've seen certain characters with headsets belonging not to the original NWN or the expasions, so this piques my curiosity.

Not that I'm aware of, no. EfU requires no downloads whatsoever, though we do have some portrait packs.

Also, when a player uses a headset, they show up as headless to anyone who doesn't have one.

If you see someone without a head it is one you dont have. Maybe from the CEP or something from another server that used haks. Sometimes you forget where things come from.

Also some of the haks out there over-ride the original heads and thus they appear as a different heads when they are infact standard heads, Id advise you check to remove these things cause they can cause fair amounts of confusion roleplay wise (specifically when describing someone)

For now, we have a strict policy of no required downloads. Since additional heads would need a hakpack, and haks would be required of all players, we don't support them.

What we do support are custom portrait downloads, and optional overrides, since both of those items are strictly an optional thing, so they don't prevent new players from jumping right into the server.

As far as I know, head models are stored in the override directory. (even cep heads, they're not included in the hak) So if you are making a character and not sure if others will see your chosen head, rename the override folder to like "override_old" and create a new, empty one. Then perhaps add soundset.2da for additional char voicesets. Once you create your char, you can rename the old one back.