I have Vista and i crushes all the time during the process. But when I try it the way you described I cannot choose music in the right window of the program, it shows me "Users", "Network", etc. but no way to get to my music files.
I also have NW-S203F and try to use VoidMP3FM with it because Sonic Stage is horrible crap. But every time it crashes during the process. I have Vista, could it be because of it? If yes, does anybody know the solution.