Activate the following cheats by renaming guests to the corresponding names:

CHEAT FUNCTION - NAME
Get the buggy to actually ride through the park [NOTE 4] - James Hunt
All peeps laugh [NOTE 4] - Atari
Peep jumps for joy [NOTE 4] - Chris Sawyer
Peeps dance [NOTE 4] - Shifty
All rides and coasters to never break down [NOTE 4] - Frontier
Removes height restrictions for building coasters [NOTE 4] - John Wardley
All rides irresistible to peeps [NOTE 4] - Jon Roach
All coasters irresistible to peeps - Sam Denney
Unlimited launch and chain lift speeds [NOTE 3] - David Braben
Decrease track friction [NOTE 3] - Andrew Thomas
Peep cam; see through eyes of guest [NOTE 4] - Jonny Watts
Unlock advanced fireworks editor [NOTE 4] - Guido Fawkes
Track friction is zero [NOTE 3] - Andrew Gillett
Increase money by $10,000 [NOTE 4] - John D Rockefeller
Guests stand around looking down at the ground [NOTE 4] - Mouse
"Flying Camera" routes editor [NOTE 4] - D Lean
Everyone moves fast for 20 seconds, but game speed is normal [NOTE 4] - ATITech
All guests get sick [NOTE 4] - Make Me Sick
All guests ride every coaster before leaving - Sam Denney
Larger and longer fireworks - Atomic
Peeps take photos [NOTE 4] - PhotoStory
New guests not allowed to enter, current guests may leave if desired - Ghost Town
Display frame rate - FPS
Lots of ducks appear [NOTE 4] - A Hitchcock
High pitched sounds - Alistair Lindsay
Train all staff for $1,000 [NOTE 1] - Isambard Kingdom Brunel
No guests can enter park [NOTE 2] - Ghost Town
Display frame rate [NOTE 2] - FPS
Build next to paths and allow fences next to paths [NOTE 5] - M Brookes
Animals constantly breed [NOTE 6] - Rabbit
Fire dinosaur instead of tranquilizer dart [NOTE 6] - Jurassic Dart
People go on the higher diving boards [NOTE 5] - Diving Boards
Hold [Ctrl] + U to toggle interface [NOTE 5] - David Walsh
Build structures underground, press [Shift] to lower position level with underground path [NOTE 5] - Mornington Crescent
Inside of tunnels turn into sharks [NOTE 5] - Rick Griffiths
You can use large movies for your billboards [NOTE 6] - Alvin Swazonegger
Unknown [NOTE 5] - Loner
Unknown [NOTE 5] - Showers
Unknown [NOTE 5] - Sun loungers
Unknown [NOTE 5] - Hgih Dives
Unknown [NOTE 5] - Jacuzis

NOTE 1: This code requires update #2 or later.
NOTE 2: This code requires update #1 or later.
NOTE 3: This code requires the v1a beta patch or later.
NOTE 4: This code requires the v1.0 retail patch or later.
NOTE 5: This code requires the Soaked! expansion pack or later.
NOTE 6: This code requires the Wild! expansion pack or later.