no, there is not a tutorial for this.
from the product results page, create a link to the page you set up to insert or update the Like products.
the link should contain a URL parameter that passes the main product ID:
for example.
productslikeInsert.phpid=33
add a hidden form element will capture the URL variable value.
create a repeat region that shows products in the database and a check box next to then that contain the product ID's.
In the multiple insert or multiple update behaviors, set the mainProduct column to use the hidden form element, and set the like product column to use the checkboxes.