Spawning Pages to specific spot in PDF

I have a fillable PDF that triggers a hidden page template when the button "Add Benefit" is clicked.  However, it always places that spawned page at the end of the document and I need it to go after page 5 and continue to go in order if button clicked on the subsequent spawned pages that pull in.  I have searched for the Javascript syntax to do so but am not having any luck finding it for my specific situation.  

Current syntax is: 

var a = this.getTemplate ("Add Benefit");a.spawn();

I know it needs something about nPage or numPage but I can't figure if it needs the bRename or any of the bOverlay commands.

Any help would be greatly appreciated!