Take a stab at decoding liftoff.abz

SVC0 is messed up and I don't know why. The rest of them seem okay.
Replace liftoff.abz usage in BigHardMe()

This function is now legible, and we're free to wonder why it gets
purchased items from one set of files with one naming scheme and
not-yet-purchased items from another set of files with another
naming scheme. And hey, now we can fix it!