OT- Mom, With the dual monitors just think of the two together as one big desk top. Your cursor moves from one screen to another as though it is one screen. You can drag and drop any open windows you have on any screen.
Installation is a breeze. I got my PCI graphics card out of an used computer. In fact, I just picked up a junked computer this am just to see if it had a PCI graphics card. No luck.
Anyway, when you get a card, just plug it into the pci port, plug in your monitor to it and turn on your machine. The PC will recognize it. Then go to control panel, displays, and and do any adjustments you need.
Good luck, Joe