[CMake] Add non-build files to a project?

[James Mansion]

(Another noob I couldn't find in the book today)

I'm building VS2003 project files OK and my
system gets built, but normally when I set up 
VStudio projects I add in the includes and
the documentation text and web files so I can
select them easily for editing.

I find myself missing this in the generated
workspace, there doesn't seem to be an ADD_FILE
that just inserts them into IDE type workspaces.

Or is there?

Thanks
James