How to edit multiple videos at once...?

forget windows movie maker. unless you want to work at a snails pace with very limited utilities. adobe premier can do that but you need to know your way around in. my best choice would be sony vegas 7 or 10. you can import very many videos and simply drag audio files alone from the trimmer to the timeline. you can then render them in your prefferd audio format. vegas also allows you to extract only audio from video directly. for better performance, dont work with videos running more than 12 hours