Register for VIRTUS training at http://www.virtusonline.org/virtus . You will create a registration email user id and password. You will be using this to log in. Follow the live training navigation on the left. (The direct link for this section is https://www.virtusonline.org/mypage/live_training_main.cfm .)
Once on the live training section, click on "Pre register" and a list of upcoming sessions will appear. Registration is required.
You will have to do the Archdiocesan background check. CANTS and Code of Conduct are done as part of the background check. They will probably explain this at your live training session. If you have taken VIRTUS before you still need the background check once every 3 years. You should receive an email from the Archdiocese about this.