i never used BarcodeCreator - therefore my suggestion maybe a wrong one.
I would try to build a script with a loop, using following steps:
search your records with a fixed filter (or get all)
sort your records, if needed
go to record (first)
do your BarcodeCreator
goto record (next, quit after last)
(i only now the functions in german, 'caus my FM installation is german)
I use this simple loop for showing pictures in a database (151'786 records) as a slideshow.
you might be able to use replace field contents . Dont know how bar code generator works tho