Transport Tycoon DELUXE Money Cheat:

Step 1: When a company is about to go bankrupt and asks you if you would like to purchase the company, say "No".

Step 2: Open up that company's window and purchase 75% of their stock. DO NOT CLOSE THAT WINDOW!

Step 3: Move the window off to the side of the screen and forget about it for 3 months of game time. The computer player will be declared bankrupt, but the displayed value of the company in the STILL OPEN company window will be in the millions! 

Step 4: Sell the 75% of the company you own and you'll make a bundle! 

Warning!!! This has crashed my system on several occasions! SAVE YOUR GAME BEFORE THE THREE MONTH MARK IS UP!!!

Hints & Tips: 

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. 

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. 

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. 

Good Ratings Made Easy:
When you rename a town, rename it "Happy Town", it will give your town a good rating.