[AccessD] Conditional subforms

Hi All:

It has been a while since I have had to play with an Access DB but a client
has called and I am doing nothing... but doing a Reno on the house.

I know how to do linked combo box; that a no brainer but how do I extend
that logic to two inter-connected Subforms on a form.

When an item is selected on the subform 1 it would be nice to display all
related items on subform 2. Also each subform should allow new items to be
added and deleted...

With enough code this could be done but there must be some 'nice' way other
than brute force.

TIA
Jim