QUOTE
If you ftp a dvd2xbox'd game to your pc, you need to delete the default.xbe and rename the one with _orig at the end to be the executer. (delete the _orig) I don't know if mulleter requires this step or if its integrated.
It should do that automatically for you with both _orig.xbe and .bak files. That bit is pretty untested though, as
most any generic patcher that would create those files should give an un-patchable xbe.
man128: I had considered it, but i cant think of a way of implementing it just yet, and its not really a priority. Even if i did try, it would require a net connection, so its much easier to just download them yourself

TinkeringAndTampering: Fixing the ISO size is trivial, i just need to change the hardcoded value. If you could tell me the size of your blank media, i will use that as the max dvd size (or provide a choice if it differs significantly). My sony dvd+r are actually 7mb bigger than the ISO size i use atm, but the dvd-r and dvd+rw are both 4,700,300,000 bytes (roughly). Imgburn will tell you the size of blank media, i dont know what else might do it.
I still have absolutely no idea what is causing the crashes you are seeing, as i cant reproduce them myself.
(With the exception of the crosslinking files thing, which is fixed in my latest non-released build)
Hopefully I will be able to find someone with a copy of MX vs ATV unleashed i can test with, cause unless i can reproduce it itll be impossible to fix. You arent alone though, cause someone else reported that problem with the exact same game.