I just checked out your hack, and the file that needs to be changed does not exist in either Leopard or Snow Leopard, (Edit: because it moved from the Application Services umbrella framework to the the Core Services umbrella framework [
See this]. [Changing it after locating it was not productive.])
It turns out, though, that its functionality is included in Lion (See "Arrange by…" at
12 Tips for Finder in Mac OS X Lion), but, as far as I'm concerned, it displays waaay too much eye candy.