Duplicate files and book id numbers

[is14fun]

This is a follow-up to my posting. I was able to replace the zip file with a identical Zip file (zip file name) and Hoster accepted it. What this means is I took one zip file with a KMA file and just replaced the zip file with a different song but the same file name and new song has the old book id number. This works just fine. So if you find a bad file you can replace it with a good one by just replacing the zip file as long as the new zip file has the identical file name. I don't know if this would work on unzipped files but it probably would.