Importing self-signed certificates

I have been trying to read a rss feed on a secure web site with a self-signed certificate, but Shrook has been having a problem loading it. Shrook uses Apple's Web toolkit to do http communication, and it looks it will not load data from a site with a self-signed certificate, when the certificate is not loaded in the keychain. Here are the steps that I used to get it to work:

1. Get the certificate from the web server (Instructions from macosxhints).
• openssl s_client -connect servername:443 -showcerts
• 
  Then copy & paste the lines from "-----BEGIN CERTIFICATE-----"
  through "-----END CERTIFICATE-----" *inclusive* into a file with the .pem extension and save it
  (as plain text, of course).
2. Import this certificate into the X509Anchors keychan in Keychain Access.