If you are running ECC 5.2 SP5, you should be using the service pack 5 version of any agent. If you roll out agents through ECC, when you push an agent to a host, this is done automatically, however, saying all this and not wanting to delete this whole story, the master agent cannot be pushed to hosts and need to be installed from cd or an image on some disk....

Hmm.... I just realised that I can't find the MA anywhere myself. I'd contact my CE and ask him to provide the MA to you.