To set Terms and Conditions on the bottom of each CPBM page:
- Login as root or admin user(with appropriate privileges)
- Go to Administration > Configuration > Server > footer.url.termsOfUse
- Set the URL to your Terms of Use
- Restart the cloud-portal service

To set the Terms and Conditions that appear in the popup window when users order a VM:
- Place the Terms and Conditions file in a location where it is accessible to CPBM. For example: /tmp/TnC.txt
- In the /etc/cloud/portal/config.properties file, set the vmops.termsAndConditions parameter to the
location of the file. For example: vmops.termsAndConditions=/tmp/TnC.txt
- Restart the cloud-portal service

Sorry, that was a typo, the actual file is: /etc/cloud/portal/cloud.properties

I have only used pure text. You could try html - let me know if it works.