How do you replace the Ignition Lock Cylinder???

Does anyone knwow how to replace the ignition lock cylinder on a 1999 Grand Caravan? I have all the dash panels removed and have direct access to the cylinder housing but am not sure how to get remove it? Is there a clip or screw to release it? My key just stopped turning and I need to replace this thing.

Thanks in advance for any help you can provide.

I have the same problem. The key turns one click but not enough to start the car. I can't get the cylinder out using the method described in the haynes manual. Does anyone know how to get it out?
Thanks Brad