Not sure why you needed the utilities. I have an install package for LW yet I'm running LW 4.x & leopard on an intel mac.
You realise don't you you could install leopard & thus install Java 6 so you could run LW 5.
To be honest you are not missing a dramatic amount. The interface is quite different & some nice changes, but they have removed so many of the advanced features it seems like it's not meant for someone who uses the program like i do.
OSX -> Library -> Receipts
Arrange the folder alphabetically & look under
i for install.
.