Cheat mode:
-----------
Add the -enabledeveloperconsole command line parameter to end of the "Target"
field in the "Shortcut" properties that are used to launch the game. Press ~
during game play to display the console window. Enter one of the following
codes.
Note: You will not see what is being typed and you may need to press [Backspace]
to remove the "`" character if it is present in the console window.

Code                          Effect
--------------------------------------------------------------------
runscript addxp X - X=amount
runscript zz_money X - X=amount i.e. 100 gold is 1000000
runscript zz_addparty NPCname - Add party member by name
runscript zz_addapproval X XX - Add approval X=NPC# XX=Amount i.e runscript zz_addapproval 1 100 adds 100 Alistair approval
1 - Alistair
3 - Morrigan
6 - Sten
9 - Leliana

runscript ai off - Turns off AI
runscript selectparty - Party selection screen
runscript chargen - Origin screen
runscript pc_immortal - Player can't be killed, don't know if this applys to party members too
runscript killallhostiles - Kills enemies I suppose, I haven't tested it yet
runscript zz_override_skills - ?

ENJOY