Adding Backup Exec Agent for Windows

Hello,

     I have a single 2003 server runing Backup Exec 2012 and will be adding another 2008 server to the domain.  It will be primarily the SQL database and programs.  I have purchased the Backup Exec 2012 Agent for Applications and Databases.  How do I install this?  I cannot see where to download the software.......It is our hope that we can back up the data on the second server to the USB attached Dell RD1000 device on the first server....perhaps you can point me to the relevant section is the users manual.....

Thank you