- Upgrade "in-place", all three sites to VC2011 RTM. ("In-place", means just run the VP2011 installation and allow it to uninstall VM2010). When prompted at each installer’s end, do *NOT* open ADMS console to migrate databases.
- Install SP1 then SP2 *without* opening ADMS console to migrate any.
- Migrate DB from one of the ADMS console (preferably one closest to SQL)
If you need to add a new site or if you have applied Vault <family> 2010 Update 2, please see this solution