It is almost impossible to do that completely. You can however demux the ac3 file from the movie and the use hypercube transcoder to split the ac3 file into 6 parts. Then you take the center sound and you use programs like adobe auditions to pull the male voices and female voices out by using different frequencies. Someone like Trooperman can probably explain it better than I can.

Here is the Hypercube Transcoder program to split the ac3 file.

Hypercube Program

Also welcome to the forums!