unable to install xfree86

[Wuttke Joachim]

I tried to install xfree86, following the instructions in
http://www.cygwin.com/xfree/docs/howto/cygwin-xfree-downloading.html .

   Question 1: is this the up-to-date documentation ?

Following instruction (1), I went to the mirror
ftp://ftp.uni-erlangen.de/pub/pc/gnuwin32/cygwin/mirrors/cygnus/ .
I went down to
ftp://ftp.uni-erlangen.de/pub/pc/gnuwin32/cygwin/mirrors/cygnus/xfree/xc-4-binaries/

where I did not find the files listed in instruction (3) of the
documentation.
I went down to
ftp://ftp.uni-erlangen.de/pub/pc/gnuwin32/cygwin/mirrors/cygnus/xfree/xc-4-binaries/4.0.3/

where I found a number of files with names like
xfree86-4.0.3-DLLs.tar.bz2.
Not all of these correspond to files named in the documentation.

   Question 2: which of these binaries do I need ?

Now comes the big PROBLEM: I cannot decompress all files. In some cases
bunzip2.exe works, in other cases it suggests that the compressed files
have become corrupted.

   Question 3: what has happened ? what can I do ?

Thanks in advance - Joachim Wuttke