Newbie trying to build a new world

[Nicolas]

Thank you all for answering. I tried all your solutions and I got one step 
further. I tried to:
ln -s /root/kernels/MOAK /usr/src/sys/i386/conf/MOAK
and got the answer that the file exists.
I changed settings in MOAK.
Then i ran:
make installkernel KERNCONF=MOAK
and it worked. But then I ran:
make buildkernel KERNCONF=MOAK
and I got this on my screen (last rows):
install -p -m 555 -o root -g wheel kernel /boot/kernel
install: /boot/kernel/kernel: Read-only file system
Error code 71
Stop in /usr/obj/usr/src/sys/MOAK
Error code 1
stop in /usr/src
error code 1
Thank you again Nicolas