Cheat Method

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.
5.  If  you  want  more  money at start of the game, edit zoo.ini with
notepad  or  wordpad  and find a line called MSMaxCash. Change that to
whatever you want and you can start out with a couple of million.

Unlock the Triceratops
     Name  one  of your exhibits "Cretaceous Corral". This will unlock
the Triceratops.

Unlock the Unicorn
     Name one of your exhibits "Xanadu". This will unlock the Unicorn.

     Note:  When  using  the "name an exhibit" cheat, be sure that you
let  the  game  name  the  exhibit  for you, then go back and name the
exhibit  as  noted  in  the  cheat. Not doing so may cause the game to
crash.

Instant Money
     Press  Shift+4  (basically  like typing the $), and you'll get an
instant $10,000.

Yellow Brick Road
     Place a lion, tiger, and a bear in an exhibit.

Double Donations
     Name one of your exhibits "Microsoft".

Halloween @ The Zoo
     Set your system date to October 31st.

Name Changing Bonuses
     Change  a  visitor's name to any of the following for the desired
effect:

Name                    Result 
Mr. Blue                Changes Everyone's Shirt to Blue 
Mr. Blonde              Changes Everyone's Shirt to Yellow 
Mr. White               Changes Everyone's Shirt to White 
Mr. Brown               Changes Everyone's Shirt to Brown 
Mr. Orange              Changes Everyone's Shirt to Orange 
Mr. Pink                Changes Everyone's Shirt to Pink 
Alfred H                White Birds Appear and Scare People 
Russell C               Fences All Deteriorate 100% 
Zeta Psi                Some People's Shirt Turns Yellow and They Puke
John Wheeler            All Animal Shelters Available 
Hank Howie              Researches All Zoo Staff Research 
Adam Levesque           All Animal Care Buildings 
Andrew Binder           All Animal Buildings