OK This is just a quess. And I dont like to touch any dev_ directorys except fckPSN lol..
But if you are certain that the settings are stored into the xRegesty.sys , then why dont you configure it up to say you WLAN, and then save that .sys file, then configure to your mates etc, and then save that file, then to go a step further, you could make a single .pkg per friends house and your settings and then keep them on your HDD, so everytime you load up, run the pkg who ever's house your at and wahlah lol.,,
xregistry is registered on PS3, if you want. Just full backup your dev_flash2 where your PS3 configuration is stored. You can also overwrite the backup that you got and it will work just fine, but ofcourse you cant use the other PS3's dev_flash2 files.
But still you cant just mess up with dev_flash2 or else you will got this:
- All youre activations on PSN or DLC will gone
- One or more of your save files might not work, specially the locked saves.
- Your PS3's configuration will totally reset just like you first boot up your PS3. Like you will see the "Sony Make.Believe" Message