Sorry if I was unclear. What I was trying to say is that we don't really need help with that feature, at least not in the form you're offering. Thoughts on the questions I mentioned above are welcome, though.

More generally, I don't doubt that you can make a system that downloads an installer from the internet and executes it based on some external variable, but I'm a bit puzzled by your claim that you could "make it in an hour" when you're not at all familiar with the JJ2+ code. That sort of statement doesn't really give me confidence in your development abilities.