WorldClient Instant Messenger can be run as a silent install with the '/s' switch.
First, on the MDaemon server, open the \MDaemon\WorldClient\html\ComAgentInstall.exe with WinZip.
Next, extract ComAgentInstaller.exe from this file.
From command line, enter:
ComAgentInstaller.exe /s
[enter]
The exact path will need to be entered and will depend on where you've put the file.