Suzanne,
You are correct that changes have to be made in printer properties to print borderless. I have made them and still do not get the result I'm after. I have printed borderless with success in Adobe Photoshop Elements so I know it works with letter size media.
It's worth noting here that the HP printer settings always seem to trump the application software settings but that's another story.
The situation I described with Word occurs when I am in page setup and am trying to change the margins to zero to allow for the 8.5 x 11 image for that specific page.
Any other thoughts on this? I could print the image from Photoshop Elements but would prefer to print the entire document (calendar) from one source.
Denny