many years later: but this trainer still doesn;t work for those of us looking for a nostalgia trip. It causes all the buildings to become overly expensive and money to randomly reset to -9999999999999.
You got me there so I decided to switch to my Windows 7 x64 installation, downloaded the Steam Special Edition of Tropico 4 (which includes Modern Times and all other DLC), our latest trainer and followed this simple instructions from Caliber -> Link
In other words: Activate the trainer with 'F1' at the main menu and wait until you get to your island and no message window is open, press Numpad 1 and you get all the money. No building price got increased that way.
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Works on Windows 10 x64 v1703 too.