yeah, I thought that this hack was a software that would actually decrypt the backup files, then inject a package in the file's structure... as if that pkg was already downloaded into the PS3 before the backup was made, then it would reencrypt the whole thing... As far as I can tell, all it does is take one of the files from the backup and replace it with a pkg *as is*, and apparently the PS3 accepts it and installs the pkg (for some people at least...).
I don't want to sound pessimistic, but this doesn't seem to be something that could lead anywhere. Having the backup decrypted/injected/encrypted would make for a much safer alternative solution since this can't be patched by Sony, and it would allow us to inject anything into the PS3...
By the way, quick question, does the backup also contain the firmware? I never tried restoring a backup, but does it free the disc then just copies back the games/movies/music/pictures into the file system? or does it "format" the whole disc, reinstalls the firmware that has been backed up as well as the games/movies/music/pictures? In other words is it just a fancy/encrypted PS3/GAMES+PS3/MOVIES, etc.. directory structure, or is it actually an image of the whole disc ?