just thought i would add something to this thread,
Just for other people that may also have trouble with this, and want a more technical reason!
i too was trying to recover a GOD game i had converted onto my jtag from a disc that i could no longer rip ...
now, you CAN rebuild the ISO as it was (using XDVDMulleterBeta10.2)
then you can re-add the security files that are missing easily using AGBX360
i have done this and compared the ISO that was rebuild from a GOD etc, to the original ISO.
And the only point you get stuck at, or that you Need from the original or Part info from another disc
(I mean this could also be how they are identifing deferent copies taht float around the net ?)
is all to do with the "Random Padding !!
which sits exactly AFTER the Game partition
without this a game WILLNOT boot on just a flashed console
(but works fine on a jtaged console! )
not sure why the 360 needs this to aloow it to boot, but it does !!!