How to backup standalone instalation

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