Here is a little something for those who updated to 4.83 and still want to play their backups. This works exactly the same as backup injection on 4.70, you can restore the backup directly without the need to data transfer from a second PS3.
To do this, download the attached ZIP file and extract it. Connect your USB or external hard drive containing your PS3 backup and open the tool. Now select your backup folder and place your game + patch in the "Inject\dev_hdd0\game" directory.
Select the rebuild database option on the tool (saves time) and inject the files. Once it's finished, restore the backup on your PS3.
Just to be clear, this will only work for NPDRM converted disc games, or any game that uses an EDAT license (such as C00 demos). You can find a list of compatible games on the wiki.