changing a breakable entity to physbox

Can it be done? If so, then how? The reason I am doing it this way is because I have a house floating in the air, and once the bottom of the house is destroyed, I want the sides of the house and the walls to go crashing down. The walls are able to be destroyed beforehand if the player chooses to do so. This is a cs:s map.

Okay have a func_physbox and name it whatever, in this case wall1 and set its motion disabled flag to checked.
Then set up a func_breakable and name it something like floor, then inthe outputs tab, click add. Now click the new
output, and under my out puts named make it OnBreak,
set the Target entites named to what ever you named the wall (wall1), now in the last field <span style="color: yellow;">via this input make</span> it EnableMotion

DO this for every wall.