Adding Child Objects in RW

Hey everyone.
I saw a tutorial on this site at one time about adding child objects onto a vehicle in RW. After numerous hours of searching for it, I cannot find it.
Does anyone know where I can find it?
Thanks,
Noel.
I saw a tutorial on this site at one time about adding child objects onto a vehicle in RW. After numerous hours of searching for it, I cannot find it.
Does anyone know where I can find it?
Thanks,
Noel.