replacing exterior window sills
I would like to replace an exterior custom made window sill which has too much rot to repair. I have visited numerous web sites for instruction how to do this but for a novice like myself, they are confusing. Some go so far to state that the interior sill and trim must also be removed which seems unnecessary to me, particularly since the face of the interior trim is flush with the plaster (the way they did it in the colonial days)and would cause untold destruction to the plaster. Does anyone have any good reference(s) to help me replace a window sill? Pictures would be most helpful.