Hi bultaco,
I dont think you need to explain the format of those files as every single ATPL'r on these forums have spent hours looking at them!!
However, those are not the complete database, there have been loads more questions added. It also depends on where you do the exams. I think the CAA are constantly changing the database, whereas the IAA dont change it that much and their last set of exams contained alot of the questions from those files you refer to.
I dont think those annexs are available anywhere.
All the best.