would it be possible to modify the multi player update for bf3 on xbox 360?

There is a update that we all know of that you must have, that's over a gig for BF3, you are allowed to use that file on a usb sandisk, and using the simple program (horizon) you can easily drag the whole entire file from the usb stick to your pc, so i was thinking would it be possible to modify it, of course no way can i do it, but i was just thinking that maybe it can be modified, then put back together, then put back on usb disk then play bf3 with that update, but of course a modified update. I was thinking this because i relized how easily the usb sandisk allowed me to just drag the whole multi update to my pc. but im just asking a question, hopefully its possible. thanks

If u got the program od what type of update file its used in then yes yes u can