*I found a long time ago that I can not import poser files with sound into Adobe Premiere, I spent a lot of time on the Adobe Forum on that one.
*Put your sound on later best format is WAV file.as you can import that into Premiere
*The problem this time it that my animation is 3,400 frames.
**This is longer then I have done in one piece in the past.
*Save your movie as a sequence if images bmp will do(create a file for them to be saved to and select this file when asked to save in the movie editor) and join them up later with Aftereffects(by importing image sequence) or  VirtualDub-1.8.8(free software,google it)Save your files allways as uncopressed avis untill you want to compress them for export to web or elswere.

*Mimic files---*Here I cant help you but your really going to be closer to a solution if you do the above.

good luck
p