Okay, I've found and fixed several issues.
1. CENTAUR is not a bodytype in the bodygloss files; I replaced it with HUMANOID_LEGLESS:BASIC_REARLEGS:BASIC_FRONTLEGS.
2. human.txt does not exist, as far as I can tell, so I replaced it with human_male.txt, which does.
3. SAVANNA is not a valid starting biome, according to the errorlog, so I replaced it with ANY_SAVANNA which cleared that up.
As far as I can recall those are all the errors I fixed. I'm trying to gen a world now and repeatedly failing, I'll post when I work out what I'm missing.
Bodytypes, Weapons and instruments have been updated, on my side...
Edit;
Ah... My body was there, but I didn't change the name... Heh. There's the body, fixed. Will try out the bug fixes and report back asap.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
[ITEM_WEAPON:ITEM_WEAPON_TRIDENT]
[NAME:trident:tridents]
[DAMAGE:140:PIERCE]
[WEIGHT:60]
[SKILL:TRIDENT]
[CRIT_BOOST:2]
[TWO_HANDED:7]
[MINIMUM_SIZE:7]
[MATERIAL_SIZE:4]
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
[ITEM_INSTRUMENT:ITEM_INSTRUMENT_GUITAR]
[NAME:guitar:guitars]
[HARD_MAT]
[ITEM_INSTRUMENT:ITEM_INSTRUMENT_PIANO]
[NAME:piano:pianos]
[HARD_MAT]
[ITEM_INSTRUMENT:ITEM_INSTRUMENT_OCARINA]
[NAME:ocarina:ocarinas]
[HARD_MAT]
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
[BODY:CENTAUR]
[BP:UB:upper body][UPPERBODY]
[BP:HD:head][CON:UB][HEAD]
[BP:RA:right front leg][CON:UB][liMB]
[BP:LA:left front leg][CON:UB][liMB]
[BP:RH:right front foot][CON:RA][STANCE]
[BP:LH:left front foot][CON:LA][STANCE]
[BP:RL:right rear leg][CON:UB][liMB]
[BP:LL:left rear leg][CON:UB][liMB]
[BP:RF:right rear foot][CON:RL][STANCE]
[BP:LF:left rear foot][CON:LL][STANCE]
[BP:RUA:right upper arm][CON:UB][liMB]
[BP:LUA:left upper arm][CON:UB][liMB]
[BP:RLA:right lower arm][CON:RUA][liMB]
[BP:LLA:left lower arm][CON:LUA][liMB]
[BP:RH:right hand][CON:RLA][GRASP]
[BP:LH:left hand][CON:LLA][GRASP]
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~