The hinges are bolted onto the door and body, so they can be replaced seperatly, assuming that's what is bent. Whether you can do it yourself or not is a different matter...they are very hard to get to without removing the front fender and getting things lined up isn't easy either. I would definately recommend having a body shop look at it before you risk making matters worse or spend money on something that isn't the problem. You never know, could even be an inexpensive fix to have them do it.
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ChuckH
"Every morning when I wake up I know it's not going to get any better 'til I go back to sleep again!" Al Bundy