Also, one of the reasons you dont see anything is because the scale of your model is wayyy large... typically the scale from 3dws to LE is 0.0078125 to get normal size objects in LE units.
you can try it, but hiding children in every other aspect of LE only results in hiding the child and not the parent.
in any case, you are making this harder than it needs to be... just hide the model... no reason to add a step to the conversion process, find the bone name, then attempt to hide the model based on its bone name... just hide the model.... easy-peasy...