if there no xf86config, the ur realy, well i cant say it cuse id probly get in trouble
,
but if that and startx are not there then u will have to get the sources and recompile it (unless u wnat to get a binary like they recomend, but then u cant customize it
go to xfree86.org to get the sources (or binary if your lazy and dont wann customize anyhitng ), search the site for the compile guide and have fun with the configureation (its the harest to comfigure as it has no config script and a lot of stuff to select from about what not to compile, and what to compile