You may not have noticed, but a number of recent Apple updates (eg. at least the 10.4.5 through 10.4.7 updates) have included the SetFile utility in their installer packages, leaving a copy in /Library/Receipts.
To find what is available on your system, try either of these commands (the first may include some unrelated results, but it's faster, assuming you've created the locate database) in Terminal (found in /Applications -> Utilities):
$ locate SetFile | xargs ls -lut
$ find /Library/Receipts -name SetFile | xargs ls -lut