not really, modding the table is just as easy. there are simple scripts to do it
It's not as simple as that. Sure, if you are really sharp, you might figure out how to modify the file table, but what are you going to do about all of the copies of the file table that are in the unallocated clusters? I don't think I have done a single examination where I haven't found 2-3 copies of the file table, including records for deleted files. Since the file system doesn't "know" about these copies, it would be almost impossible to modify them via a script.