The process of making printable Greek files with vim has improved a lot
with recent versions of vim. You can type both modern Greek and Greek
with the full complement of accents (polutoniko). This describes the
steps I use in Debian (Sid, but should work in any branch or indeed in
other flavours of Linux).
make sure all the texlive stuff is installed. This should give you
both greek and polutonikogreek (i.e. accents, breathings etc.).