Xfree86-4_0 installation problem

[Sorhel at cs dot com]

Hello,

I'm running Windows NT / Build 1381 / Service Pack 5
on a Siemens Nixdorf laptop.

I've installed the latest Cygwin version using the
set-up script and it works.  I've then installed the
latest Xfree86-4_0 files from a mirror (ftp.franken.de).
When I try to start the Xwin server with the startxwin.bat 
script from an MS-DOS window, I get the following 
messages:

_XSERVTransmkdir: Owner of /tmp/.X11_unix
should be set to root
pwin->width = 00000500
pwin->height = 00000400
pwin->paddedWidth = 00000a000
pwin->bitsperPixel = 00000010
Calling WinAllocateFramebufferMemory

Then a window pops up saying

ERROR
Direct Draw Init Failed
Error = 88760078 (unknown error)

I don't know how to fix the first problem (ownership)
under Cygwin since I don't know about users.
My /etc/passwd does not have a root in it, and
I don't have an adduser script or equivalent anywhere.
I can't do a chown on the directory since root doesn't
exist.  But I don't think that's the main problem anyway.

Any ideas?

Regards,
Soren