Robin Hoods Playground

Hi gang.
wanted to thank cofree and everyone that made this possible. I have been reading and viewing the videos from youtube on how to mod our 360. I have a problem. I have modded my cousins and my uncles boxes to the 1.5 ixtreme cfw. But before i modded mine i read about the 3rd wave games not playing unless you update to 1.5.1. We have a total of 3 xbox 360s. (my uncles, my cousins and myself). I got mine to work on the 1.5.1 cfw. But when i tried to reflash my cousins box i reflashed over the thumb drive i used to flash his and my uncles box. So i dont have his original key or my uncles. So i think i locked his box up. Everytime i try to put in a game Backup or Original it's giving me the message in english/chinese that i need to put in a playable game disk (to that extent) White screen. When i turn it on it takes me to the dashboard. But i get that msg. What do i do? and learning from this mistake i backed up my key and saved it on my ipod. Can my cousins box be saved? and how would i go about reflashing my uncles box without his key? OH BTW we all have BENq drives. Used latest iprep not sure which but wasnt the 8.8 thinking it was the 9? ( i know it had a 9ner in there). Thanks for the help in advance.
-worried

Lets be clear on what your saying and someone will help for sure.

Are you stating that you cannot read the drive on uncles box because you erased it prior to reading? I would try to read it again, if your not getting anything you have most likely lost his key for the drive. Don't doing anything drastic prior to reading his drive, if you get a good dump from his drive..pull out thumb drive...boot back into windows....insert thumb back in..... get the keys from the backups folder...copy them to 2-3 places...boot back into dos...and then fben. Hit me back if you need more.

You can recover your USB pen to get the files you deleted back, even after formated.

Google; "FAT file recovery" or NTFS, depending on what your stick was formated to.