I've put up mine at http://home.uchicago.edu/~obmontoy/XF86Config-4
Getting XFree4 running on my Wallstreet was non-trivial. I originally got it working in LinuxPPC 2000, compiling my own from ajoshi's sources (search the linuxppc-user archives at http://lists.linuxppc.org/lists/linuxppc-user if you want); when I switched to Debian Unstable I couldn't get it working, so I just copied my whole /usr/X11R6 directory to my new /usr. A recent apt-get upgrade broke it again, but luckily I still had my old tarball and I got it going again right away. The interesting thing is that I've done another apt-get upgrade this week, and I think I got new XFree debs, but this time it is not broken. I'm really not sure whether I'm running my own Xfree or the Unstable debs---I think it's my own. But one thing I've noticed is that my XFree86.0.log has a different last line from the one you included: mine says (II) ATI: Candidate "Device" section "Generic Video Card". where yours says > (II) ATI: Candidate "Device" section "ATI Mach64 3D Rage Pro". Which is presumably a result of the following from my XF86Config-4: Section "Device" Identifier "Generic Video Card" Driver "ati" EndSection Hope this helps O.
