Software Deployment

I have an Engineering app that is about 4GB in total size and no repackaging application we've tried can package it up to a nice .msi or anything else. What we had to do was create .bat files that call and customize the install.exe & setup.exe files from the application.

I'm testing the K1000 now and our ultimate goal is this

Unfortunately the application needs to be run from a local drive, so I need the software to be pushed from the Kbox to the local disk and then the .bat files launched.

We have a ~100 machines that need to be updated so an automated distribution is definately prefered.

Anyone have any experience or ideas with such a senario?