As soon as Smart Start supports Server 2012 I will notify on a new blog post and link it from here as well.
In the meantime please download the white paper below (By clicking on the HP Logo) for the instructions on how to install 2012 without Smart Start.
If you need help with any additional details or need a HP server solution then please contact us and we will be happy to help you.
**UPDATE** Intelligent Provisioning (Which replaces SmartStart on a Gen8) now supports Windows Server 2012 - Please click This link (Intelligent Provisioning)
Technical ISS Solutions Team