...the .xinitrc file tells X11 what to start when you start it up. You may know this, but you can run Desktop Environments such as KDE and Gnome, and also Enlightenment Window Manager by editing the .xinitrc file. First you need the fink installation of KDE (or whatever environment you want).
however you may want to add to your .xinitrc file (pico ~/.xinitrc) . /sw/bin/sh (errr... i think that is right.... i would double check that line)
This points X11 to the appropriate path of where binaries are installed (e.g. lynx, mail, and nmap (if applicable).