Documentation tool

I've been considering using phpDocumentor to document a web app I'm working on. Apart from parsing inline comments in the code itself it allows to maintain external docs, and I need to deliver end-user documentation in a format like MS-Word or PDF. However, I'd need to write these external docs using DocBook, an XML format I've never used.

I wonder if there's another tool that would suit my needs better. I don't really need to document the code itself, just produce a couple of manuals with installation and usage instructions. My notes are currently in plain text files but these are ugly to print and can't have images (such as screenshots or diagrams). A Word processor would not be source control friendly.

Googling has confused me with the thousand documentation tools that seem to exist...


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