I would like to populate a radio field with the data from a hidden field. Here is what I am planning to do:

1. User chooses 14 items from a checkbox field on Form #1. User submits form and it sends user to Form #2.
2. Form #2 has a hidden field that is populated with checkbox choices in Form #1. Form #2 also has a radio field that I would like to populate with all the items listed in the hidden field. The user selects one of the options and submits the form, and then it sends the user to Form #3.
3. Form #3 has a hidden field that is populated with checkbox choices in Form #1, MINUS the option chosen in the radio field from Form #2. Form #3 also has a radio field with the remaining 13 items. User selects radio field and submits Form #3.
4. After form is submitted, I would like to show the 2 items selected from the radio fields in Form #2 and Form #3.

 
I have been able to get Form #1 to send the data submitted to Form #2 based on this documentation, but I am unsure how to remove options as the user selects them in the radio buttons.
Alternatively, I could send the choices from Form #1 directly to the radio field in Form #2, and then use this method to remove any options already selected in the radio field.
 
Would love to hear what others think about this. I'm on a tight deadline and would appreciate any insight anyone has to offer. Thanks!!