You can install over existing walls, drywall for example, by just gluing and nailing the paneling over top. The other option is to strip the walls to the studs and install the paneling on the studs.
Find the studs in your walls and hammer the paneling to the studs AND on the edge of the paneling. The on the paneling seams you will place a piece of transition strip to hide the nails and the seams of the paneling.
In this economical world our rooms can decorated by wooden panel, which is available in the form of frames, stickers. Which cab be mounted on the wall with the help of nails or paste which will suit our wall.