Here is a link to the help file for kixforms classic...

http://www.kixforms.org/assets/files/kixforms/KiXforms_246.chm

And here is a link to the most recent help file for kixtart...

http://www.kixtart.org/binary/docs/KiXhelp453.zip

And location of other help docs...

http://www.kixtart.org/?p=manual