code: def makeProductPicker(self):
          
          productPicker = liveform.LiveForm(
              self.coerceProduct,
              [liveform.Parameter(
                str(id(product)),
                liveform.FORM_INPUT,
                liveform.LiveForm(
                lambda selectedProduct, product=product: selectedProduct and product,
                [liveform.Parameter(
                  'selectedProduct',
                  liveform.RADIO_INPUT,
                  bool,
                  repr(product))]
                ))
                for product
                in self.original.store.parent.query(Product)],
              u"Product to Install")
          return productPicker
docs: Make a LiveForm with radio buttons for each Product in the store.