CreateUser and ClearReg.pkg

I am currently building a new image with a Mac OS 10.6.3 DVD and then running the 10.6.4 combo update to bring the system up to 10.6.4. I then have 17 other packages installed in the build train and everything is working great. However, I would really like to be able to create 3 local users on the machine, get rid of the system setup wizard and have ARD enable when it gets to the login screen. So far when i have included the createUser package and the ClearReg.pkg it will boot me to the login screen but my user accounts don't work. I then booted from a DVD to try and rest the passwords thinking that maybe the password hash didn't work correctly but there are no users listed except for root to reset the password so it leads me to believe that the CreateUser.pkg isn't working in the build train. Does anyone have any insight on why the users aren't being created? Thanks Brian Hubbard