If you are using the NetStream method you don't have to do anything. It will play the mov. If you are using FLV Playback Components, you just trick them by changing the extension of the video from mov to flv.
You can even do this in Flash 8, as long as your Flash Player is 9.0.115 or higher.
Note: It you wont see it in Publish Preview unless your stand alone player is overwritten with the new version.