Yes you can. It's simply a case of remove the bolts that hold the doors to the hinges and bolt new doors on. Do you want the one piece ones with wind down windows or the 2 piece ones with sliding windows that can be lifted off? You will need different strikers (the bits that bolt to the bodywork that the doors shuts on) and the stays to stop your doors swinging open too far may be different but that is a very easy job to change/modify them.
Harry