I saw this on The Other Major Site. There is a new recorder module, available for free in Beta version, at: http://www.neusinger.net/recorder
This is a vast improvement over the default replay, and allows you to save replays (smaller files than flight video). Playback is much smoother, and includes AI traffic. Also has a CD player-type playback control (you can hide this if you want).
I've only had a chance to play with this for about 15 minutes, but it looks like a new indespensible addon.