Not exactly the same but similar, I used this method when I used the P4 female head onto my falmers daughter's body:-
{
version
{
number 4.01
}
figureResFile :Runtime:Geometries:P4NudeWoman:P4NudeWom.obj
actor BODY:1
{
}
actor hip:1
{
storageOffset 0 0 0
objFileGeom 0 0 :Runtime:Geometries:PhilC:SJ_hip.obj
}