Ya use duct tape to attach it to the sides of the cab. It won't hurt anything.

No specific kind, just whatever you can get your hands on. Go to your local Home Depot and check out the fencing section. You can use the metal or plastic kind, just get the something with smallish holes in it. Cut it down to the size of your cab. Fit it over top of your plants and gently push down, then attach. It should work alright.