Hi andrewcass2,
Sorry I didn't get back to you sooner.
I was able to install the Officejet 7110 printer on one of our labs with Win 7.
To change the paper settings I went to start, devices and printers.
Right clicked on the printer and then clicked Printer Properties.
Clicked on the Paper/Quality tab.
I selected the A3 297x420mm - brochure and clicked OK.
From the application I went to file, print, preferences, Paper/Quality tab and the same A3 297x420mm - brochure settings were selected.
I had no issues on the Win 7 computer.
It must be something on your computer like Admin rights or the driver install isn't installed properly.
Thank You.