Hi,
With LoadRunner 12 Community Edition you are able to make only full LoadRunner installation i.e VuGen, Controller and Analysis on one machine. Standalone components installation is possible with the LoadRunner 12 edition available from hp.com/software/updates for the customers with valid HP contracts.
For more details about this download please review 5.1.4 My Updates—Software Update Portal in http://support.openview.hp.com/pdf/HP_Software_Customer_Support_Handbook.pdf
An SSO demo is available at http://support.openview.hp.com/pdf/sso/index.html
Kind regards,