Step 1: You need use the "URL Helper" to capture the URL. like:

http://nsv.stream.aol.com/uvox?cachefile=/aol/us/aolmusic/artists/wmg/madonna/madonna_sorry_
9488577733_320.nsv&uid=&sessid=&surfacePoint=us.winamp.web&jswk=Winamp-Video

see the below pic:

How to "URL Helper", please read here

Step 2: Select the URL in list, click mouse right button, select the "Copy URLs to Clipbroad".

see the below pic:

Step 3: Run NSVRecorder, add the URL to channel and record it.

How to use NSVRecorder, please download the help file or refer to our online help.