It was removed from OS4 Final because it does not work with the new memory system afaik.
You can try the WarpUp emu from update 4 (powerpc.library) but, it will crash sooner or later.
This might eventually be fixed in a future BoingBag.
What can be done meanwhile though, is to set up a dual-boot, OS4-PR update 4 and OS4-final, and play WarpUP games with OS4-PR update 4.
