Switching first and last name of Artist

[pone]

@chrismp3junkie

Right now, most of my MP3s are in the following order:

Bruce Springsteen
Spice Girls

I would like reverse the order for artist names so it reads alphabetically, as follows:

Spice Girls
Springsteen, Bruce

Although I know I can make the change easily using the Artist field - select all the artist and make a global change - when dealing with compilations or soundtracks, this becomes tedious and onerous.

If there is a method to make these changes with a batch of files, please recommend. If not, please take this a suggestion for future versions. Thanks!

Action: Format Value
Field: Artist
String: $regexp(%artist%,(.*) (.*),$2',' $1)

BUT:
Works only for artists with one sure name.
If you want Jon Bon Jovi to Bon Jovi, Jon (and not Jovi, Jon Bon) you have to use:
$regexp(%artist%,(.*?) (.*),$2',' $1)