There are two ways to thread your messages into a discussion. You can
do it manually, or take advantage of features in JBN to automate the
process.  I'll explain the hard way first...

* In JBN, open your book which you intend to post with.

* Enter "Re: Remailers Suck!" (or whatever the relevant subject is)
  into the "Subject: " field.

* Find the message you want to followup and copy the message ID.
  (example <3e125abb862940edf80aa2a5a276790f@anonymous.poster> )
  Take this and put "References: <msg-id>" in the additional headers box
  under the subject.

* Copy bits you want to keep from the original message, you can paste
  these into the book by right-clicking and selecting "Paste As
  Quote".

* Don't forget the "Newsgroups:" header! :)

You should be able to manage this easily provided you can get the
message ID out of your newsreader.

Now, the easy way involves getting the entire message **and headers**
into the clipboard. This is the part that depends on which newsreader
you use.  With XNews, for example, make sure all headers are displayed
within the message and then right-click and select "Copy All".

With the entire message (and most importantly the headers) on the
clipboard, select the book you will use to construct a reply, select
"Follow-Up Clipboard (Ctrl-U)" from the "Message" drop-down menu. You
can then quote the entire message and edit as appropriate. It is
really simple once you've managed it a couple of times.

One point to watch out for! If replying to a message in a long thread,
you may want to trim excess References elements from the
headers. Remailers (esp those that use Mixmaster software) don't take
kindly to long headers or badly wrapped headers.

Summary: All you really need is the message ID of the post you are
replying to.