Is there a away to stop a product to be added to the cart, besides giving an out of stock option. Here is my situation.

I am running a digital music store, where the products are albums, but in order for the user to be able to pick and choose individual tracks, I made each track a product attribute.

The problem I am having is someone can click on the product and select add to cart, before adding any tracks or the attribute for the full album. I would like to be able to pop up a message asking them to make a track or album selection, instead of adding a $0.00 item into their cart.

Can this be done easily?

Thank you,

-distraub