Hi, umtang41.
Thanks for purchasing and installing Meta Box Builder. To create a Image Select instead of Radio Buttons for selection. You can use Image Select
field located under Advanced
section. You'll see a field editor like so:
http://prntscr.com/6m9cz9
On the Value
text field, enter the Value
which you want to save to post meta and on the Image URL
, specify the URL which you want to represent the radio.
Best regards.
Tan Nguyen