Sound/voice samples from movies...

I use a program that directly captures to .WAV whatever is playing in my sound card right now, from whatever source:

MP3 my MP3 v3.1

http://www.mp3mymp3.com/

You need to select the right input for the signal, it's usually the "Monitor" device of your sound card. Make sure you have the right input by recording several samples and checking that they're not empty.

Then, I just hit Record and it saves it to .WAV. I stop whenever I want.

For Mac users there is Audio Hijack which is pretty damn good. About $50
for PC i use Easy Video to Audio... but there is some pretty good FREE ones out there like Pazera

Good luck

billy