Thanks to Lynn Pye there is now a native installer for
OS X 10.2.x. This will not work with 10.1.x. This has
minor adjustments to use the Aqua LAF and with the
menu bar appropriately positioned.
To install download
and use StuffIt Expander or equivalent to open the
installer (doubleclicking on the .tar.gz file should do
this). Double click on the .pkg file and the installation
will begin. It is set up with appropriate defaults, so
you should only need to click through to complete
the install. It will be in a folder in /Applications.