You'd have to do some sort of scripted solution to deploy the agent to the machines without using the console. While we don't provide support for this functionality, there is an example of the syntax at http://www.shavlik.com/support/Protect801HTMLHelp/HFN.htm go to Agents > Using an Agent > Creating and Using a Manual Installation Script.
I didn't see if you confirmed that you have no communication between the console and the potential agent machines, it requires port 4155 connectivity from the console to the agent machine and port 3121 from the agent to the console. The reason I ask is because it's far easier to install agents from the console instead of manually.