arnahud,

edit, apologies- this program will work (
http://www.mp3mymp3.com/mp3_my_mp3_recorder.html). You need to record in "what you hear" mode and it will work

edit again, since posting last ive done more research and have concluded that Audacity (
http://audacity.sourceforge.net/download/windows) is the better program. Its free, open source and produces the more faithful recording. mp3mymp3 didn't seem yield as good of recording results. Hope this helps!
if you would like I can try to grab the clip from Das boot for you if you tell me which part