can some1 tell me, how to open the list in pose player in the game?? n how to add the downloaded poses into the pose player list??? because, each time i press any option at the pose player in game, my sim become freeze ......please some1 tell me... im very new to this mod...

It's up to individual creators to support their own work - I'm sure there's info on the pose player download thread, and if the explanation there is insufficient or you're still confused, you can comment on the thread to get answers. Good luck!