Often people ask how to setup a shared Serendipity installation. Even though this is documented, there is no "run and be happy" script provided for that. The reason is that usually your webserver has specific dependencies on how to maintain virtual hosts, user directories and SQL databases.
Thus, services like supersized.org or others need to create their own scripts for dealing with this.
A help for novice users now comes through Chris Lander. He has committed Bash and Perl scripts that take on the job of setting up shared installations. The CVS repository where he committed his code is online at SourceForge ViewCVS. You can also download the whole package.
Chris is very enthusiastic about getting feedback or other user help. You can reach him at "clander at labbs dot com". Drop him a line, if you are using his scripts!