Hi Maff! Thanks for replying me!
1. There is the file I sent here first: https://www.dropbox.com/t/n9ZtwUPysFJzS3UL (works to 25th September). Actually, it seems the mod doesn't launch, because Arma says the mod isn't owned, installed and available (have some problems sending a log, sorry).
2. I haven't found the backpack classname, so I had to take the name somewhere (i don't remember).
3. I'll test it now! Thanks!
Edit: I tried it, but it doesn't still work.