front face mapping question

[neilp]

:help: i have a modelled a box room that i have view matched in scene and front face mapped the interior photograph of a room to, I need to add in an item of furniture into the room and have it casting shadows and reflections on the floor and walls - My problem is by adding diffuse and reflection to the walls and floor to enable shadow and reflection catching this makes the final render way tooo bright and so does not match the original photo - I dont want to upset the client by messing too much with the original photos.

Is there a way of surfacing the front face mapped walls so that they receive the shadow and reflection but are not effected by the light intensity I am using in the room? any help would be very much appreciated