Me and my friends have been working on someones backyard and made a new deck since the old one was rotten. its pretty simple to do and is cheaper than building a real deck. I dont have any images but its pretty simple to explain, we started out by just removing the old boards and replacing them with new ones. on top of those boards go some cheap plywood. But not particle board it has to be the plywood with a few plys otherwize it will get soft when it gets wet and it can cave in. once the new plywood is down all thats left is to put a carpet or turf down on top of that and youve got yourself a deck.