I've found lots of scripts that take a MXD and publish it, or take a sddraft file. However these all seem to create a new service with the default settings. I really need a script that replicates the "Share As>>Map Service>>Overwrite and existing service" menu options in Desktop.
It would be nice if at the end of this Wizard there was an option to save what you have as a sddraft, as at that point it has picked up all the settings from the existing service.
Have I missed something here?