LaunchDaemon harikiri in the image

Hey all I have a script that installs and moves a few things around that I need to run at first-boot, as root, and that then disables/deletes itself on completion. I've got my plist setup and a working script, my question is how I should kill the LaunchDaemon. Should I have the script unload the plist from launchd before I delete the plist or does that matter?