Can't install Virtualbox Guest Additions on 11.3

Ok guys I am have some issues getting VboxAddtions installed and Google is not helping…

I try to mount a shared folder and I get…

FATAL: Module vboxvfs not found.

When I try to install the additions I get…

jgleaso@linux-s7o8:/media/VBOXADDITIONS_4.0.4_70112> sudo ./VBoxLinuxAdditions.run 
root's password:
Verifying archive integrity... All good.
Uncompressing VirtualBox 4.0.4 Guest Additions for Linux.........
VirtualBox Guest Additions installer
Removing installed version 4.0.4 of VirtualBox Guest Additions...
Removing existing VirtualBox DKMS kernel modules                     done
Removing existing VirtualBox non-DKMS kernel modules                 done
Building the VirtualBox Guest Additions kernel modules
The headers for the current running kernel were not found. If the following
module compilation fails then this could be the reason.
The missing package can be probably installed with
zypper install kernel-2.6.34-12-desktop
                                                                     failed
Your system does not seem to be set up to build kernel modules.
Look at /var/log/vboxadd-install.log to find out what went wrong.
Once you have corrected it, you can run

  /etc/init.d/vboxadd setup

to build them.

Doing non-kernel setup of the Guest Additions                        done
Installing the Window System drivers
Installing X.Org Server 1.8 modules                                  done
Setting up the Window System to use the Guest Additions              done
You may need to restart the hal service and the Window System (or just restart
the guest system) to enable the Guest Additions.

Installing graphics libraries and desktop services components        done

So I try to compile the source code like the following…

jgleaso@linux-s7o8:/usr/src/linux> sudo -u root make oldconfig && make preparescripts/kconfig/conf -o arch/x86/Kconfig
#
# configuration written to .config
#
scripts/kconfig/conf -s arch/x86/Kconfig

*** Error during update of the kernel configuration.

make[2]: *** [silentoldconfig] Error 1
make[1]: *** [silentoldconfig] Error 2
make: *** No rule to make target `include/config/auto.conf', needed by `include/config/kernel.release'.  Stop.
jgleaso@linux-s7o8:/usr/src/linux> 

Help please?!?!

Tried running ‘make prepare scripts’ in the /usr/src/linux folder now it looks to be compiling but it still won’t start…

Starting the VirtualBox Guest Additions failed
(modprobe vboxguest failed)

VirtualBox 4.0

i did it differantly but yes you are right, I needed to uninstall the previously installed package then I ran the Vbox Disc install file and all is well. Wow that was A LOT of trouble.

Google can be a problem in so far as that most web pages are not dated so it is easy to find old instruction to obsolete versions. Also many things are just plain wrong