The best bet is to check the lights.rad file in notepad. Find the texture name and copy the light value. Paste it into the brightness field of a light entity and have the breaking light trigger it.
As for the sound. Have you entered all the ambient_generic's fields correctly. You only need the type ambience/example.wav
Not the drive and every folder on the way.
It may depend on the format too. Use Sound Recorder from windows to record as it saves to a HL compatible wav.
That's the end of my wisdom on sounds.