ListBox Selection

Hi,
I've been trying to create two list boxes as described in a previous thread

Side by Side Compare
What I want to do is have the left list box which is the master (table A) and the selected records

copied to table B which is a user table as shown in the camera example in the above link. I can create the

first list box but how do I create the second one for Table B. Table B should read the current data for

that user and write or delete any changes to it.
Thanks
Al