firstboot.pkg / iceberg / casper

I'm was reading the deployment guide (http://www.osxdeployment.info/wiki/InstaUp2Date_Guide) and was trying to do a firstboot pkg (launchd, firstboot.sh and postflight.sh) to help alleviate some of the problems I'm having with scripts. I think I have the scripts and plists and stuff down that it asks for, but I don't know how to get it packaged back up. I have iceberg and casper at my disposal, but iceberg seems a bit too complicated, and casper doesn't allow me to create the pkg. Okay, so as I was typing this, I came across this link...https://www.afp548.com/forum/viewtopic.php?showtopic=19312 ------ Create a new "Package" project. Tip open the disclosure triangle and select "Scripts" (there seems to be a GUI issue, you may need to select "Settings" and then "Scripts" before the available "Installation Scripts" appears correctly). Under "Installation Scripts", check "postflight" and "Choose..." your script. Keep an eye on exactly what your shell script assumes about the environment it's running in--even though Installer is targeting /Volumes/Instadmg_Target, postflights run with a root of "/". To rewrite the scripts appropriately, see the variables listed at "Some information is passed by the installer to these scripts when they are launched" here: -------------- Which is info I need, but it doesn't mention the launchd or firstboot.sh scripts.... any suggestions how I would go about doing those in Iceberg? What I would select under "scripts" and where I would put in the launchd item? Following that, do I put that into instadmg catalog or do I deploy that via the workflow through casper when I image a machine?