IMPORTANT:
So I've had a few people inquiring about producing jetpacks commercially, from these files.
I want to make it clear that you are not to use these files for commercial purposes. I am not making any money from this (admittedly enormous) effort on my part, and I know everyone will understand when I say that I will not be granting any commercial use rights, or rights to re-sell these files as your own.
I am in fact putting some measures in place now to ensure usage is of personal project nature ONLY.
If you are looking to produce packs and sell them, these are not the files for you. There are other jetpack files out there that (as I understand it) grant you commercial rights, and you should be using those instead.