How could I use my powered PA speakers for home theater purposes?

What you need is a pre-amp or receiver that has line out, you connect the line out from the preamp to the speakers and drive them that way...its not really worth it though would probably cost you more than what you would get for the set of Nanostats...also you would be downgrading from surround to stereo only..also everything would be hooked up in og with more distortion and noise....