this whole flat package deal?

So I use instaDMG built into the Casper 7 suite and create compiled images of apps + pristine installs of my OS. I am compiling 10.5.8. Since apple released these flat packages the newer updates, like Java 6, will not compile properly. Anyone have any work around for this? I don't have SUS set up in my environment so I have to package up and run updates via the Casper Suite, which works but is annoying. Any tips, or pointers? There are about 12 updates that use this new flat package stuff and I cannot compile them into my master image.