QUOTE(MaxP @ May 23 2007, 07:07 AM)

my lack of knowledge in this area is showing.
is there a seperate key to sign savegames ?
or is the same key used to sign all protected files ?
Other things you might use a resigner for would be:
- Gamer profile: Change gamerpic to one you don't own, edit gamesaves that save to profile, maybe even add achievements!
- Downloaded media: Change expiration on rented movies, or even add your own media and sign it so it will run from the HDD (not as important now that they have media streaming).
- XBLA games
- Edit the trial version and sign it with your console id as full version, and, well, I think you can figure out the rest...
Those are just off the top of my head. There are probably many other uses.
The guys who run www.360gamesaves.com have figured out a resigner, but they have not publicly released it yet. They claim they will eventually release it as a web script to use only for re-signing gamesaves.
Check major torrent sites for "xbox 360 resigner" - one has been released recently. I haven't gotten a chance to d/l it yet, so I'm not sure how well it works.