first you must prise the top of the door frame out about half inch with a plastic or softish lever,protect the paint with tape,then wedge frame in this position,now you will need to use a long rod to either flick the door release lever or try and lift the button,if the door still wont open it may be dead locked,which means it wont open even if you are inside the car,there are ways but complicated to explain,next bet would be to try and get a key cut via dealer or lock smith via chassis number.good luck.
jeff, December 2007