It would only work for hotfixes I believe in most cases (for example 1.21.6 would work on 1.21.7 and 1.21.8) but since there is a drop in the middle (1.21.9) it would probably not work.
HAI sounds like hour of AI, and cubemap does sound like a panorama, so it's probably just the panorama texture files. Not sure why it's a separate texture pack though.
This code is expired and no longer works. I will not be putting up a new one, either, because of stealing that coincided with an account joining then leaving.
