XBL Content for mod'd/ban'd XBoxes?

Here's a question that I've had for a long time. The situation now is that a good number of people are now banned/banable from XBL. If patches come out for games (like the Halo 2 fixes just announced), is ther a way to get those fixes or transfer those fixes to mod'd boxes?

I have one unmodded box that I saved specifically for XBL so I can get the download. But then, can I somehow apply those fixes to my other box (or friend's boxes)? I have an idea that this can be done by finding the relevant directory (some folder in "e:/udata" or something) and just transfering it, but I would be much more confident in your collective expertise.

Thanks.