For example, if a product is in a category "Photocell Switches" – the resulting export says ‘photocell switches’ , which I guess it's done it job perfectly

But this will be rejected by google base (Merchnt Center) as in this example it would need to display
‘Hardware > Electrical Supplies > Light Switches’
Any ideas on how we can use CSVi to help us further here. Can we use some sort of mapping or rules again?
Andy