To be the best ever hack there should definitely be a better documentation of the whole hack and a "what to chance" text file instead of just a install script. With just a install script and a short readme text file it's very hard to check, after installing the hack, what the hack has chanced in the *.php files without running the install script again.
And if possible at all make the hack less complicated or make a light version for the people who are not already PHP gods.