I don't think so. If Sony wanted to detect anything like could have done a check on category_game.xml years ago and banned everyone who did NOT have an official file. Every CFW/HEN/HAN uses a modified game xml. Also almost everyone in the scene uses a custom wave or sound or xml mod somewhere even if its just package manager or Singstar blocked, yet we see very few bans. So don't worry about it too much, just my opinion.