DKIM DomainKeys Install/Setup

We run the following: Redhat [login to view URL] Sendmail (8.13.8/8.13.8) with ESMTP Our dedicated server needs DomainKeys installed/setup. We are a college recruiting firm who wants to have DomainKeys running so we can satisfy Yahoo and AOL's (among others) bulkmail regulations. We need this done this week so we can stay on track with our college's schedule. I am brand new to DomainKeys so i will need clear instructions on how to send a test message with DomainKeys in place so i can verify it is installed.