How to fit wall panels?

I need information on fitting trim, no instructions were included in the kit I purchased.

Written By Interior Panels

We do normally provide full fitting instructions - we have clearly missed adding them to your delivery. We will send them to the email address you provided straight away. Sorry about that John. YOU WILL NEED Measuring tape and square Pencil Fine tooth saw (electric or hand held) Craft knife Adhesive and applicator gun Spirit level or plumb line Silicone sealant Safety glasses and gloves HOW TO INSTALL Step 1: Apply fixing trims to the wall Measure the back sections of fixing trims for the corners and edges, cut to size with the saw. Apply adhesive and attach directly to the wall. Step 2: Attach the panels to the fixing trims Measure panels and cut to size with the saw. Apply adhesive to the fixing trims and walls (or tiled surface) and attach panels. Panels slot together using a tongue and groove system. Step 3: Apply decorative finishing trims (front sections) Measure and cut decorative front trims with the saw. Apply adhesive and tap into place. Use silicon sealant to seal any gaps around the base of the shower tray, pipework and fittings.