When you install the mod, look in the mod folder. In the mod folder there is a file called winterberg updater. Run that and it automatically updates your mod to the latest version.
Someone would have to make a script for it, which would take time. It's not really useful so I don't think anyone would spend time making a script for it.
The suggestions thread was closed for a reason. Don't give more suggestions. What do you mean by manual siren script? You can turn the sirens on/off in the LA Mod.