Did I miss something in the documentation, or am I experiencing something abnormal?

Using the same PC/image (VMWare snapshot) and the full standalone agent package.
- If I install the agent while the PC can ping the primary server, it installs properly and reboots
- If I install the agent while the PC * cannot * ping the primary server, the install hangs. the process "ZENPreAgent.exe" runs for ever, but there isn't any activity.

Does the workstation need to be able to contact the primary server for the agent install to complete? I don't need to register the workstation, as I can clear the cache and let it re-register.

The purpose of the install, is to create an image of windows.