Installing from downloaded files or CD

[Peter Flynn]

I want to install lilypond for a colleague who only has
a 14.4Mb/s dial-up connection (don't ask!).

Can I download the relevant files on my (faster) connection,
burn a CD, and install them on the target machine? 

Presumably this means a copy of Cygwin plus a .tar.gz of
lilypond, but what else?

As an afterthought, if a system already has TeX Live installed,
will lilypond use this, or has it forked away?

///Peter