Where Can I find a software training template?

Hi,

One of the software developers on the team developed a very complicated tool and I'd like to write the training documentation for our users and I can't seem to find any templates around this.

Anyone have any good templates I can use? I don't want to spend the time thinking about the table of contents.

here is what I was thinking of though:
> Break it the application by each "feature". For each feature, talk about the inputs, raw functionality, and outputs.
> Provide WF documentation and for each item in the workflow, write a couple lines about it.
> maybe even write the physical "steps" of traversing through each item and even providing screenshots.

I'd like a more structured approach however. Let me know!