How to backup standalone instalation

[alainm at pobox.com]

I have searced the xwiki site, list history, the web, subscribed to xwiki-users, before asking this:

I am running xwiki standalone, the file is wiki-1.1-milestone-1.tar.gz and it says "Standalone installation including a Jetty container and an HSQLDB database all set up. Should be used by first-time users"

Please tell me where are the files (or directories) that I need to save to have a full backup. Both database and configs but not the libs. It is running in /home/alain/dev/java/xwiki.

I compared the original .tar.gz with my modified xwiki, appart from logs, only these files are different:
  db/xwiki_db.script
  db/xwiki_db.properties (only the date changed)
  temp/imageCache/       (empty directory, belongs to root)

db/xwiki_db.script looks like an sql-dump, and my modifications are included. Could it be that a database dump is created every time I modify something? Anyway the database apears *not* to be inside the xwiki directory...

PLEASE HELP, I want to make a full backup, but without all the libs and fixed stuff (the whole directory is 55Mb! ).

Thansk for any help,
Alain