To replace the bathtub in a mobile home, turn the water supply off, disconnect the drain line and water supply lines, and twist the shower head to remove it. Cut the heads from the plastic rivets on the surround, and drill the rivets out. Loosen the surround, and pull the surround off the wall. Unscrew the tub from the wall to remove it, install the new bathtub and surround, and connect the drain and water supply lines.
Choose a new bath that is the same size as the existing bath to avoid additional remodeling, and opt for a bath that has the same type of drain opening to prevent additional plumbing. To install the new tub, slip the tub in place with the skirt on the skirt track, and screw the tub into place. Do not overtighten the screws.
Cut a hole in the surround for the shower pipe, if necessary, and apply adhesive to the walls to install the new surround. Press the surround into the adhesive then pull the surround away from the wall. After two minutes, press the surround into place a second time.
After the tub and surround are in place, drill holes in the surround for the faucet, using the faucet as a guide. Connect the drain and supply lines, and reattach the shower head.