Press ~ and type 'DebugMode 1'. Then press ~ again and press Tab. This 
will show you a list of the various functions available. Press Tab again to 
scroll down the list.
dm_god   God Mode 
GetLevel X   Adds X # of Levels to Your Char 
dm_givegold X   Give X Amount of Gold 
SetCON X   Set Con to X 
SetWIS X   Set Wis to X 
SetINT X   Set Int to X 
SetSTR X   Set Str to X 
SetCHA X   Set Cha to X 

After entering the code and pressing Enter, it will say 'success' on some. 
On others, it will say 'Entered Target Mode'. You will have to click on your 
character to enable the changes.