Scripting some Settings

Hi All Am compiling a preflight script for InstaDMG to set various things up. I have a couple of settings I don't seem to be able to make stick. For some of them if I run the command from the terminal I am getting the desired result so I know the file and syntax of my command is correct its just when I use it in a preflight script and I am wondering if I am just missing something simple. The settings I have issues with are these: In System Preferences: General: "Double Click a windows title bar to minimze" - turn this on Mission Control: "Show Dashboard as Space" & "Automatically rearrange spaces based on most recent use" - turn these off Language & Text: "Formats" - Set Region to Australia Security: disable "Automatically update safe downloads list" - Turn this off - this is a biggy as we have an authenticating proxy for internet access and it constantly pops up proxy boxes if this is left on. I've pretty much managed to crack all the other settings I need using fseventer and Xcode to inspect the plists and using plistbuddy or defaults to write out the plist files, but these couple are driving me up the wall Thanks for any assistance you can give! -- Laura