Request for advice: how to install documents

[mark damerell]

Lubuntu 12.04, I recently downloaded Lilypond 2.18.2, (Linux generic package

from lilypond.org/unix.html ) Then

sudo sh ./lilypond-2.18.2-1.linux-x86.sh --doc --prefix /usr/local

[password]

This ran without visible error and lilypond works, but the documents are badly
installed:

1. Man pages are in    /usr/local/lilypond/usr/share/man/man1   (at least the
ones I have found) and the man program cannot find them.

2. There are lots of  html  and  pdf  files in

/usr/local/lilypond/usr/share/doc/lilypond/html/Documentation   

and sub-directories and there seem to be several  copies of everything that
is represented. So please is there a sensible way to install the documents?

By "sensible" I mean: one copy of each manual, and some convenient
way of reading it. 

Another problem appears when I try to read the manuals from the website.

The split HTML files have navigation buttons for next page etc, and I cannot

get them to work.

Please any advice? Thank you