Radio button custom fields

[fabioweb]

Hello
in this page i have eleven products inside a select.. (product11.png)
"Siamo", "Età media", "Gradiremmo" radio buttons are additional mandatory info related to main product..
My problem is that in cart this additional info are rendered as product and this is wrong beacuse are only extra info.. The only product in the example (cart.png) is "cena 1 persona"
So my question is: how can i manage main product and radio button info?
Providing another example is how to have a car store: Car is the product , Color is an attribute. In my example is like to have Car and color both as products..

Thank you for any suggestion
Regards

[K&K media production]

it seems this is build with a product builder extension and not with the native virtuemart workaround  ... so you should ask there