I think people with newer versions of vB and people who have hacks installed which use templates will find this hack will need some work to get installed. Some of the lines you search for are for the 2.2.2 standard vB files, the code has changed 6 versions down the line and those with hacks will have further modified their code. You have to search for maybe the first few words of a line and then insert changes directly into the code instead of an easy simple supercool copy and paste
Like it's said: For the good things in life you must work
The thing is, the work you have to do for this hack is minimal, it takes what, an extra 2 minutes to do the hack if you suffer from having a later version and/or have modified code already