you can go to the field definitions and have them all be autoentered. Make sure the "allow user to override during data entry" is checked on the validation tab so that they can be unchecked if necessary.
(assuming that each magazine is a field with a yes/no check box)
I'd use this auto-enter calculation so that updates to the value list automatically update the auto-entered data:
valueListItems ( get ( Filename ) ; "yourValueListNameInQuotesHere" )