This is a printer setting, not a Spawtz issue. To exclude the url when printing from Internet Explorer, do the following:

  1. Click "File" (Or the arrow next to the printer icon if using Internet Explorer 7)
  2. Click "Page Setup"
  3. Delete all the text in the "Header" and "Footer" textboxes
  4. Click "OK"

Now, when you print, the printer should not print any header and footer information.