[Morgeruat]

hmm, if you're doing a multiplayer game you can (if not open up the mpsave folder, or make one if you don't have one, and copy your game into it, then go and create the new character, import him into the multiplayer game, and delete your cleric from teh line-up)

it may not work with your main character but I've done this before in IWD and with a pure mutliplayer party (good for creating a party you want instead of having to pick up people and hope they match your idea of fun)