Changing party affiliation to vote in PA?

When I first registered to vote 4 years ago, I didn't register with any particular party. I'd like to do so now. How can I go about changing my party affiliation in PA?Changing party affiliation to vote in PA?Go to the county court house where you registered. Just pick a party and have them change your record.Changing party affiliation to vote in PA?Your changing to Libertarian, right? Good for you. ;-)