Good Ratings Made Easy:
When you rename a town, rename it "Happy Town", it will give your town a good rating.
Money for the Tunnel:
Go to the edge of the map, and from the shore build a tunnel towards the other side of the map, and you will receive the amount of money it costs to build the tunnel. You can get over $2,000,000,000.
No Computer Aircrafts:
To kill off the computers aircraft, build a big hill at the end of this runway and cover with lots of trees.
Take Out CPU Buses:
To kill the computer buses, build a snakelike railroad over his road, put a train on it and see how his buses are shortly waiting and then be destroyed. Be warned: Use it only on roads, which you don't need, else you could lose your own buses, trucks etc.