Use BESR for image backup

Hi ALL,

If I have one or two Windows 2008 Servers on the LAN and want to use the "Backup Exec System Recovery 2010" to backup server image, how many license(s) should I buy?

Does anyboy use it to backup the "Backup Exec Media Server" on the LAN?

Is "Backup Exec Media Server" a pre-requisite for using it?

Thanks in advance!