I created a list for GetIdType(...) myself. Is this list complete? Who knows. If I find something new I will add to the list.

Here the list:

ID_TYPE_BODY_ACTOR      =   7
ID_TYPE_CAMERA               =   8
ID_TYPE_LIGHT                   =   9
ID_TYPE_PROPS                 =   12
ID_TYPE_BASE                    =   16 # Magnet
ID_TYPE_DEFORMER         =   18 # Magnet
ID_TYPE_ZONE                   =   21 # Magnet
ID_TYPE_HAIRPROP           =   23 # Only applies to hair done in the Hairroom.
ID_TYPE_IS_CONTROL_PROP =   28
ID_TYPE_GROUPING          =   29
ID_TYPE_MEASUREMENT  =   34

# The following ID covers various scene objects.
# CenterOfMass
# GoalCenterOfMass
# BackgroundMaterialActor
# AtmosphereMaterialActor
# FocusDistanceControl
ID_TYPE_VARIOUS         =   26