Module for manual/tutorial?

Please can you tell me where can I find module like dpDocs.
I have postnuke .750 and already use dpDocs modul. I need module for create manual/tutorial on my site ( www.ptice.net)
thanks,
dboto
Well, I just wrap an Acrobat file. But you can also use a download module, although it's harder for people to "view as you go".