If you have more than one website that you would like to protect with HackerProof Service, you should order another HackerProof license. Here are the steps you need to follow.
First, open http://www.comodo.com/hackerproof/ in your web-browser and click on 'Order HackerProof' tab.
This will launch ordering wizard and you will be prompted to
Select your term:
Select the needed and click on 'Submit & Continue' button.
This moves you to step 2 of the wizard
Your contact information
On the ordering form, ensure you check the radio button 'Existing Customer' and fill out your username and password. This is important as it ensures the additional Domains are added into your existing account.
Read the Subscriber Agreement and select the checkbox 'I agree with the terms and conditions of the Subscriber Agreements(s) and Schedule(s)'.
Click 'Confirm & Continue to Payment'.
After making the payment, order confirmation page will be displayed and the additional domains will be automatically added to your license for HackerProof daily vulnerability scanning.
You can add the additional domains for HackerProof Scanning as explained in PCI Scan page.