If you can’t download the Simply Sticky Notes app (there are others) on your phone and transfer to the PC using say a USB cable and then install, an option as you mention a large screen, is to create a new Notepad document on your Desktop, then resize it so it covers a suitable area on the left/right side of the screen.
Then open Word and Restore Down/resize the window so the Notepad window can be seen and referred to/text added to, on a side of your choice.



Note: There are ways to make a Window - say a Notepad Window, stay on on Top (float) when you type into Word but a third partry program would need to be downloaded to do that in Vista.