NT 4 Server also supports Raid at the OS level, no addon needed. This would be a good weekend project I think. NT 5 will not have a PowerPC version I'm told. Some rave about it, others complained it was slower than v2.5. I've tried different movieplayers, including apples older version of movie player.
Nothing seems to work to remove the jerkyness.
I'm trying rerendering the clips to see if the compression algorithm makes a difference. Have yet to try other movies. Since the 2.5.1 player is freely distributable, this method of getting around the licensing fee should be legal. I have SD 8.1 installed and installed QT 3.0 without any problems. It works great.