Can I change a NPC's skeleton in anyway through GECK like in TESConstruction Set?
No.
I'm trying to make a playable DeathClaw Race
Not going to happen, because !
So is there a script function like the OBSE "Setplayerskeletonpath" for GECK, and if it is through an expansion script engine, a link would be helpful.
There is only 1 NPC/Player Skeleton path and it applies to ALL NPC's and the Player so changing this will effect every NPC in the game
ALSO
even if there was a way to alter this on the fly and even if it did not effect every NPC in the game that function still only applies to the 3rd person skeleton path and as such its nearly worthless for game's such as FO3/FONV that are primarily played in 1st person for obvious reason's.
ALSO
The GameSetting for setting the 3rd person skeleton path no longer exist's its now hardcoded so its basically beyond dynamic re-assignment -> though the 1st person path still exists......