Unplug the power cord for the control panel from the electrical outlet and pull the stove away from the wall so you can get behind it. Turn off the gas supply valve if there is a connection to the stove.
Disconnect the gas line from the stove using an adjustable wrench if there is an existing connection. Raise the top of the stove and prop it up with the prop rod. Remove the orifice -- a small brass fitting -- from each burner assembly using a socket and ratchet.
Install the new orifice to each burner and tighten it snugly using a socket and ratchet, but do not over-tighten it or you will damage the threads. Disconnect the prop rod and lower the top onto the stove.
Remove the cap from the regulator under the stove using an adjustable wrench. Remove the insert and turn it over. Place the cap back on and tighten it with the adjustable wrench.
Locate the orifice on the bake and broiler burner. You can access this by opening the broiler drawer. Tighten the orifice using a socket and ratchet. The bake and broiler orifice is adjustable and snugging it down will complete the conversion for that.