Silent Install of Parallels Desktop 4?

Can anyone offer any insight in do performing a silent install of Parallels Desktop 4?
Version 3 was a nice packaged install, but this sadly appears to not be the case in 4.

The closest I can get is /Volumes/Parallels\ Desktop\ 4/Install.app/Contents/MacOS/Parallels\ Installer
which simply launches the GUI version of the installer.

Does anyone know if there are some command line switches I should be using.
Working with PArallels in an enterprise environment is a huge pain not having the ability to deploy over the network.

Thanks in advance for your assistance.

 

There's a hidden "Install.mpkg" package on .dmg's root, which is native Mac OS installer package. You can use it for silent install.

 

Well I feel rather silly. Thanks so much for pointing me in the right direction.