|On your computer...|
Go to Control Panel - Classic View - Printers and Faxes
You DO NOT need to install the software for the shared printer yourself on your computer - the shared printer will appear automatically in Printers and Faxes, eventually, after a local network has been set up between the two computers and File and Printer sharing have been enabled on both computers, and your computer will automatically copy the drivers for the printer from the other computer the printer is connected directly to, but settings for it will be default settings on your computer.
RIGHT click on the icon for the shared printer. Choose Properties - set the paper size the way you want it, etc.