yes but didnt the LE2 software update disable your ability to interop unlock your device?
if we can get the phone accept our own signed cabs we can extract the driver updates, fixes and patches and ignore the diagnostic tool updates that disable our interop unlock method.
in short make a backup BEFORE applying any samsung OEM updates, when you need to interop unlock again, you can revert to your pre OEM update, apply the interop unlock again, then re apply the OEM update. from what i gather you are best doing this every time you have an OS update as there have been issues with restoring backups that cross OS versions...
Oh course you lose any unbacked up txts etc, but i think the benifit outweighs the hassle.