Thanks for your reply TIG.
Yes, I did activated the extension, succesfully by following this video.
Youtube Video
view > toolbar also activated.
Maybe there is BVH animator plugin, which i can't find it anywhere yet..just maybe..
Well, i'm using Windows 7, Sketchup 8 (free), SimFonIA Animation Tool/SAT(trial version).
Attach the print screen of my Sketchup. The SAT toolbar is there, but not the "import BVH file" tool icon like in the video. And I think maybe that "import BVH file" tool icon not belong to SAT toolbar.