[rhn-users] How do I use SpamAssassin in RH8, Evolution 1.0.8?

[Tom <tomh simas com>]

My setup: RH8 desktop, Evolution 1.0.8.  We have no Linux servers at
all, our mail server does no content scrubbing/filtering at all.

I'd like to use SpamAssassin in my desktop environment, but have no clue
where to begin.  Using red-carpet, I can see that I have spamassassin
2.31-16, procmail 3.22-7, sendmail 8.12.8-5.80, fetchmail 5.9.0-21.8.0
and evolution 1.0.8-11 - but now what?  

I currently use Evolution to process my email, and have created filters
to "folder-ize" everything. But I want to go a step further.

How do I 'tie' all of this together so that incoming email is scrubbed
and potential spam is flagged so that I handle it?  Note that I can make
no changes to our servers, and can't upgrade evolution.