The magical X in Ubuntu

Till now i had the idea that 'xorg.conf' file is an absolute must for
X to start,
In-oder to find any possible X-Configuration tools in ubuntu 
(xorgcfg,xorgconfig only works when X is running!,otherwise it gives a
grey screen!!!)
i just did #rm /etc/X11/xorg.conf

just to watch the fun!,i typed 'startx' and found out the most
unexpected result!, my X,the GDM all started running
perfectly..........not even complainin!!.the text output pointed to
something called 'getconfig'
its very nice!,the windows(TM) system had their kernel in-built
display running on all cards only thing is that it will be 256 colors,
but the user level X many -a-time failed
even to start up a low-res X,and now ubuntu with its fastness(its
really fast on my 112Mb!!) and robustness is giving me a feel of
it!(the made for desktop! feel)

Kudos to the UBUNTU team and Can anyone tell me a way (other than
filling up directory space and xfs not running) to
CRASH!!!!!!!!!!!!!!!!!!!!!!! the X in my ubuntu?