(Backup this file first!!)

To unlock the ending movies, yes movies you would have to beat the game using both methods,(dont want to spoil) and one of the three times you have to be a good char, the second one you have to be an evil char, and the third one does not matter. goto your baldur's gate II directory, then open baldur.ini scroll down tword the bottom and find the entry [Movies] under that should be a list of movies and after =1 , at the bottom of that list BEFORE the next [ ... ] put in the following ...
ENDMVE1=1
ENDMVE2=1
ENDMVE3=1
each need to be on their own line! Now enter the game, go to movies and enjoy!