Open up the item.cfg in the main FHPLUS folder in notepad, it should bring up some coding, below the coding, paste this:
[Wooden Keyblade]
mesh=WoodenBlade.mesh
bone=mouth
offset_f=3.5 2.5 -.1
rotation_f=0 0 0
offset_c=3.5 2 .1
rotation_c=0 0 0
[Kingdom Key]
mesh=KingdomKey.mesh
bone=mouth
offset_f=-3.3 2 0
rotation_f=130 1 5
offset_c=-3.3 1.5 .2
rotation_c=150 1 5
[Terra's Keyblade]
mesh=Terra1.mesh
bone=jaw
offset_f=-3.3 2 0
rotation_f=130 1 5
offset_c=-3.3 1.5 .2
rotation_c=150 1 5
[Ventus' Keyblade]
mesh=Ven1.mesh
bone=jaw
offset_f=1.3 3 0
rotation_f=100 11 10
offset_c=1.3 2.4 .2
rotation_c=100 11 10
[SoulBlade]
mesh=SoulBlade.mesh
bone=jaw
offset_f=4.6 43 7
rotation_f=100 11 10
offset_c=4.4 42 6.9
rotation_c=100 11 10
[Aqua's Keyblade]
mesh=AQUA1.mesh
bone=jaw
offset_f=-1.6 2.2 0
rotation_f=100 11 10
offset_c=-1.6 1.2 0
rotation_c=100 11 10
save and exit out