Easy. Press MARK. Scroll up to highlight LOCATION. Press ENTER. Use the pop-up key pad to enter the cords you want. Highlight and press OK in the key pad when you've entered the numbers. Highlight OK at the bottom of your screen and press enter. You're done! Those new coords have just been assigned a new waypoint number. When you want to navigate there, press FIND, WAYPOINTS, ENTER, highlight the new Waypoint number, ENTER, GO TO, ENTER....and you're on your way.
Thanks for the help.