If you want to make you'r player lip-sync in a movie ... I recommend that use POSER7 for this work.You can make you'r player character very easy and make you'r movie ... Poser is as crazy talk but make you'r character lip-sync in 3D face.
http://i32.tinypic.com/k996pf.jpg
If you are a smart boy So you can to take a snapshot of you'r game and import in Poser as background and make you'r player move as a movie, Of course should work more on light map of poser if you want to show it very natural.
See this image that i made :
- Merge a Poser character with A FPSC level snapshot.
Note : Only in Poser 7 added lip-sync mode.
http://i32.tinypic.com/zoaw6t.jpg
The life is standby ... So decide for you'r target and then you'll see that you are arrived and get it.