Thanks a lot for all your replies! :)

fab wrote:
 > I think you can use a statically compiled sh and put it in /etc/rc, it
 > will be run by init at startup.
 >
 > That would do the job imho.

But what about the root file-system? AFAIK, the kernel will panic, if he 
can't mount a root-fs.. so, how should the kernel obtain this info 
without /etc/fstab?