Utilising the hidden Apple Recovery partition, I've managed to modify it to include Casper Imaging and display the Casper Imaging App on the "Mac OSX Utilities" screen. The only issue I'm having is that when I launch casper imaging nothing happens and when attempted from the command line i get "illegal instruction: 4" The best bit, Its only 1GB in size. You can't get more lightweight than that.
The ultimate goal is to make a lightweight netboot image that is 10.6, 10.7, and 10.8 agnostic that will run on any mac regardless of build and machine spec. Much like booting into Windows PE via PXE and starting the SCCM task sequence to deploy windows.
I've tested the same Recovery partition against a dozen of our macs ie Imac, macbooks, and mac minis and they all load the same with no problems...
Happy to be proven wrong but that agnostic lightweight recovery partition looks to me like its begging to be made into a Netboot image to run Casper Imaging. I just can't make the application work inside it.