On Mobileread I noticed the ebooks have the author as "Caesar,Julius" (no space) and the author-sort as "Caesar, Julius" (with a space).
Thinking this was the way to do it I changed all my ebooks using this method - which I found the most rapid (perhaps 20 secs per book).
1) In Libprs500 GUI highlight all the books and choose to save to disk.
2) For each ebook to have the author changed do the following:
a) open meta-data in GUI and change
b) detach current .lrf file
c) find where you saved the .lrfs (from point 1) and copy and paste the .lrf you wish to change to directory c:/1/, then rename it to 1.lrf
d) copy and past author details from GUI into wordpad within this text
C:\progra~1\libprs~1\lrf-meta C:\1\1.lrf --author=Caesar,Julius --author-sort="Julius, Caesar"
e) copy and paste the text from (d) into console and press <enter>
(link provided by kovid -
http://sourceforge.net/projects/console/)
f) attach 1.lrf to current book in GUI
It did not seem to matter that each file being connected was named 1.lrf - when doing step 1 again later it renames it to the title and number again.
Any thoughts?