You can start XDarwin by double-clicking the XDarwin icon in /Applications and select whichever mode, "rootless" or "full screen", via a GUI dialog panel. You can run this XDarwin in the rootless mode in 32k-color mode, too. You can get more information from http://mrcla.com/XonX/.
As for the RPMs I have built for MacOS X Release, the following directories might be useful:
where you can find spec files, my private patches, source RPMs, and binary RPMs, respectively. Note that the RPMS directory contains two subdirectories, "ppc" for architecture-dependent binariy packages, while "noarch" for those architecture-independent. For those packages without real source RPMs or those provided only as tar balls, you can find the corresponding original source packages and my private patches in src. The binary tar balls are in tgz.
These packages have been tested on my machines (G3 Series PowerBook, aka Wallstreet and Ti PowerBook G4) but might not work on your platform. Install them thus at your own risk.
Notice also that new packages are under ~fujiik/macosx/10.0.X/, while the old ones built on Public Beta are directly under ~fujiik/macosx/ and will not be supported.