system backup and recovery from NAS server

I am considering buying Ghost.  I want to be able to backup and recover my system (operating system, drivers, programs, and data including Outlook email .pst files) to a NAS server.  Can Ghost do this?  If my local hard drive were to fail, and I were to install a new drive with no operating system, can Ghost recover my full system from the NAS Server?  Do I need to use a system recovery disk first to access the network and NAS server?  Is Ghost compatible with NAS servers such as the QNAP servers?  I appreciate any help in understanding this very basic question.