I don't know how well this will hold up with writing many files - at all. Anyone want to do some crazy testing with the
very good chance of corrupting data?

Also, I did not have to format to do the above, but switching back to a bios with the 42 char limit prevented the xbox from doing a directory listing. So it
seems that switching to bios which support longer filenames would work w/o problem, but going back would require that you at least remove all offending files.
Most of this is all speculation of course.