that's one good method which I am using if I have access to setup a tftp server in this network. In this case I don't...
I tried to use the kernel/initrd from the cd/dvd and started them via grub.
Normally that should work, but I ran into a problem with the network card like in this thread: http://forums.opensuse.org

In some forums the said you have to unload the tg3 module then load the broadcom module and again tg3. Unfortunately if I use the kernel/initrd from the dvd there is no broadcom module.
Then I started to build a new initrd with the needed module but again stuck with a similar message like this:
Could not load modules .... modules.deb not found

For now I call it a day and will give it another try tomorrow...

Thanks so far.