1) Unzip RefalP.zip to an empty directory.
2) Call Cygwin and enter under it in this directory.
3) Run
    a) ./configure -prefix (path to cygnus/cygwin-b20/H-i586-cygwin32)
    For example:
    ./configure -prefix C:/Progra~1/Cygnus/cygwin-b20/H-i586-cygwin32
    Pay attention to the direction "/"!
    b) make
    c) make install-win
4) The directory with RefalP can be deleted.
5) To continue using Refal Plus without cygwin,
just add the directory C:\Program Files\Cygnus\cygwin-b20\H-i586-cygwin32\bin to the path,
which contains the following files: rfp.exe, rfpc.exe, rfpchk.exe, rfps.exe
and the cygwin1.dll library required for the compiled program to work
on Refal Plus.