VF04 transaction in background

Hi All

I have one through many threads to get my requirement closed but was not able to find the solution. I would want to run VF04 in background.

I did create a variant and schedule it but it also converts the deliveries into invoice. I only want the list of deliveries to be updated in spool so that the same can be sent to users. But now it gives the output but also converts to invoice. Please let me know if we can stop the invoice getting created and get only the list.