Matthew,
You are welcome. It was a fun challenge. I hope you find a use for the procedure. For my reactor modeling book I had to go the other direction and print landscape to get things on a page.
The examples I posted included a border around each column. You can exclude that if you wish. Also, once you create the two column pdf file, if you decide to print it, you need to switch the printer, and unselect the multiple page button. The letter size should already be set in the file.
If you do want the border, you may need to create a page in the windows forms that is just under half width. When I printed one the border lines on the left and right did not appear.
I know there are a lot of steps, but once you learn them it is not difficult, and the first few don't need to be repeated once the new page form has been created in Windows.
Harvey