Replacing exterior door that isn't prehung
I am remodeling our kitchen and we figured now is the time to replace our ancient door as well. It's exterior but opens to an enclosed porch. We'd like to replace it with a prehung door but we don't want to disturb the interior casing. I've heard replacing these older doors can be a pain since the newer prehung ones don't necessarily fit well. Any one have experience in doing this? Is the process really any different if it was already a prehung door? I may need to build up the threshold, but really my biggest worry is damaging the existing interior casing. Else I'll have to be very careful removing it so I can reuse it when the door is hung.