Type harrydebugmodeon during game play to enable debug mode, then press ~ during game play and type set engine.playerpawn bcheatsenabled true to activate special cheat mode. Note: Enter the set engine.playerpawn bcheatsenabled true code every time after the game tells you the level goal (for example, "Attend Herbology class on the Hogarts grounds"). Press ~ to display the console window, then activate the following cheats by entering the corresponding codes:

CHEAT FUNCTION - CHEAT CODE
Harry is weightless; disabled when using wand - fly
Harry goes through walls; do not use wand - ghost
Disable fly and ghost codes - walk
Set how fast Harry runs - setspeed
Set friction; 0 is sliding, 10 is default - setfriction <0-10>
Give Harry indicated number of Beans - givebeans
Award indicated number o Gryffindor points - givehousepoints
Get indicated number of Fireseeds - giveseeds
Get all Wizard cards (except for secret one) - giveallcards
Get indicated number of challenge stars - set baseharry numstars
Kill Harry - killharry
Kill everything - killall
Save game without searching for book; load it again from the level select option - savegame 1
Quit game - quit