If you have loads of old kill files, you may want to convert them into
score files. If they are ``regular'', you can use
the `gnus-kill-to-score.el
' package; if not, you'll have to do it
by hand.
The kill to score conversion package isn't included in Gnus by default.
You can fetch it from
`http://www.stud.ifi.uio.no/~larsi/ding-other/gnus-kill-to-score
'.
If your old kill files are very complex---if they contain more
non-gnus-kill
forms than not, you'll have to convert them by
hand. Or just let them be as they are. Gnus will still use them as
before.