[xwiki-users] Downloading Mailing List Archives

I would like to capture all of the historical mailing list traffic locally for further processing (formatting and searching). At http://lists.xwiki.org/pipermail/users/ I am able to download each month's traffic in a "Gzip'd Text" format. Can anyone tell me how to convert these files to something useful? I researched this subject on Google and, while there is a fair amount of information and even some scripts for converting this Pipermail gzipped format to mbox format, it doesn't match up with what I actually find in the download files from this list, whether in the original gz format or after uncompressing. For example, the scripts expect to find "From:" literals in clear text, and that is not the case in these files. --Gary