Judging from the amount of hacks you have installed just on index.php i doupt that. You would have had to re hack or use a compare program to do that. The version number has changed in your acp but thats easy to get around if you know the database schema or found the file that would have allowed you to change it. it is impossiple to upgrade without losing hacks if you do not use a compare program. And it is impossiple to upgrade and keep hacks without doing anything.