Treeview key problem

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I've build a table where i have the following contents:

Groupname Nodename
Test
Test Dixons
Test Dynabite
Dixons Computers
Dixons Software
Dixons Else
Dynabite Computers
Dynabite Software
Dynabite Else

Both computerstores (Dixons and Dynabite) sell computers, software and other stuff. I want to create a treeview in which i can put this.

The problem i run in to is the problem how to fill this table with all the computerproducts, Softwareproducts and other stuff. How can the treeview know wich product belongs to which store???

Please help me out... i've been puzzling about this too long and my summer holidays will start soon.... i've got to crack this before that time!

my nodes addingline:

set nd= treeview0.nodes.add(nodboss, tvwChild, rst![TreeID] & strText, StrText)

Very many thanks!!
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