Good guide to what? KiXtart ?

There is the manual that ships with it in the zip.
There is http://www.kixhelp.com/Downloads/KORG-FAQ.chm
There is http://sclogic.vo.llnwd.net/o2/downloads/kix/KiXhelp451.zip

The best place is right here on the board. Typically "most" questions are answered in minutes and rarely do any go unanswered for more than a few hours.

We also have an Examples forum (though not very many examples)
http://www.kixtart.org/ubbthreads/postlist.php?Cat=0&Board=UBB11

There is also a book, but not free:
http://www.kixscripts.com/book/

Hope that helps.