1. Open config.ztd with winzip.
2. Open Economy.cfg with notepad or wordpad.
3. Search for cZooDooRecyclingAmount and change the number to whatever you want. This will be the profit for every recycle you do. Normally you recycle around 8-12 times per month.
4. Also, look for cKeeperCost which should be 800. This is the salary you pay your zoo keepers. Change it to something lower and your expenses will decrease dramatically.
Turn off Foliage Drawing
Press Ctrl-F to turn off the drawing of all foliage on the map. Hitting Ctrl-F again will turn it back on.
Name a tour guide Rosalie and all your tour guied's salaries will turn to zero.
Put 10 different animals in the same exhibit.
Yellow Brick Road
Place a lion, Bengal tiger, and a Black bear in the same exhibit.
Name a bear "Deer" and the bear will gets free.
Unlock the Unicorn
To unlock the Unicorn, rename one of your exhibits "Xanadu". The game may crash if you give this name to a new exhibit.