This tool was made for the sole purpose of resigning XBOX 360 data.

-Check for Updates
-3 ID Slots for frequently used profiles
-Extract/Inject files
-Resign Multiple Files at a time
-Recognizes game and name of the File
-Protect Container File
-Plus others

Download it here:

*Note: This may show up as a virus on some anti virus softwares due to the nature of this program.