Tool for changing titles to 200 audio files

I have about 200 audio tracks from various artists and I want to change the titles to look a bit better.
The titles are now like this :

i.e. michael_jackson-remember_the_time and I want to change it into
Michael Jackson - Remember the Time

I can do it by hand but it would be such a pain. Does anyone know a tool that can automate this job for me ? Thanks

Batch Keyword Cleaner might do it. It does most things like this.