Have you looked at how PDF forms work?
If I have a page of form fields and want to include a second page of the form, I need to uniquely name all the fields on the second page with a different name than the first page. Sine each column heading associates with a form form field, this could be a problem.
Also does not the IRS require a control from, W-3. that has the summarized data from the the W-2's.