Solved:

RewriteCond %{QUERY_STRING} a=Article_Page_Display&id=(.*) [NC]
RewriteRule ^(.*)$ http://LinuxIntro.com/\?a=WCMS_Page&id=%1 [R=301]

I am trying to do a Redirect with SOME Querystring Parameters Maintained. I already know how to do a redirect with ALL parameters maintained, or with NO parameters maintained, but in this particular...