First, measure and plan out the layout of your room and how the panels will look on your wall. Utilize some different panel sizes for areas under windows. Keep in mind you can rotate our panels horizontally as well.
Once you have received your panels you can simply adhere the panels and the top rail and bottom rail to the wall. Use blue painters tape to hold the panels in place while the adhesive sets. You can also use a pin-nailer to install the panels, top, and bottom rails.
Now it is time to finish. You can easily then paint the panels and the wall. If you used a pin-nailer, make sure to fill in your holes with a filler putty before you start painting.