How to swap first and last name is in the regular expression FAQ:
But it's not quite as simple as that.
Very few people would use the sorting method that you use for music groups. Nobody would expect to find 'Allman Brothers Band' under 'B'. Also, beware that the regular expression shown in the FAQ doesn't work properly for artists with two words in their last name ('Townes Van Zandt' becomes 'Zandt, Townes Van' instead of the more accepted 'Van Zandt, Townes').
Here's a good writeup on how the sort order for names is generally done: