BOM Question

I am running SW2005, SP3.0, and am working with a BOM where I have added in
some items. Is it possible to make it so that I can have the BOM item
number linked to the baloon where the item is used?

For example, for simplicity I used a single part for an outlet box, and I
need to call out the 2 parts that make up the outlet box. To make the BOM
contain the information I added in a line and input the information. Using
a stacked baloon I can force it to contain the item numbers that I need.
What I need to do is to find an automated way of changing the balloon number
if the item that I inserted manually into the BOM is moved.

 

I'd try to use a 'dummy' part.

As in - stick in a part that has no physical geometry, and use the regular
custom property stuff to enter the info.

The trick will be selecting the part for the stacked balloon, but I THINK
this can be done by selection of the part from the feature manager.