Or you could go grab Pasketti's log stripper ;)

www.cws.org/~pasketti/eqlog.html

Bottom of the page:

LogSplit - Everquest Log File Splitter 1.6 - August 15th, 2002
Features:
Splits the log files produced by Everquest into multiple files.
Will split the old-style multi-character logs, as well as the new single-character logs.
Can split the logs by session, day, week, month, and year.
Small size
Doesn't splatter DLLs all over the place
Can handle multiple log files, of any size