i am using Fedora core 9
whit kernel 2.6.26.5-45.FC9
and want to insert:
patch-dazuko-linux-2.6.26.diff.gz

the readme says
cd /linux/src/dir/linux-a.b.c.d
# zcat /proc/config.gz > .config
# zcat patch-dazuko-linux-a.b.c.diff.gz | patch -p1
# make menuconfig
(select Dazuko in the Security section and exit, saving changes)
# make
# make modules_install
# make install
# reboot

but when i go to root# /
and type dir
there is no /linux/**

i think i had a kernel source installed in the past but it should be located elsewhere than,
or maybe i should still should install a kernel source
than please whatś the yum install kernel_src rule for this,

so the standart of fedora core 9 does not contain a
/linux folder

# dir

bin dev home lost+found misc net parallels.log root selinux sys usr
boot etc lib media mnt opt proc sbin srv tmp var

I guess this is a typo. By default kernel sources are installed in /usr/src/linux-x.y.z. Now regarding Fedora the correct path is something like /usr/src/kernels/x-y-z. So you have to be in that dir to follow the patch installation instructions.

ok im in the kernel source directory now and following the readme.
i get:

zcat /proc/config.gz > .config
gzip: /proc/config.gz: No such file or directory

i should think this folder is also somewere else and that whole readme is a typo i think ?

I think that this howto is for some other distro. Look in /usr/src/linux-x.y.z to see if there is already a file named .config:
If not, most distros keep a copy in /boot with a name like config-x.y.z. Copy that file into the kernel sources directory and continue to the configuration of your kernel.