This type of edit for the PowerStore is not supported and will take some custom editing to get worked out properly. In order to see the values in the cart you will need to add additional cart columns to your cart. Once you have them you can modify the add to cart server behavior to set the new options to these new columns.
You would then need to update the cart display manager on the cart page. You would at the least need to drag and drop the new columns bindings onto the cart display where you would like to see them.
After all of this you would need to ensure that you update the confirm pages. You will need to add new columns to your oder details table to hold the new values. Then you will need to update the store order details server behavior to associate the newly created columns with their corresponding data. On the confirm and checkout success pages you will need to update the cart displays to include the new information. If you want this information to be seen in the email receipt you will need to modify this as well to include the new details.