After I wanted to boot from that DVD I came into the boot-flag menu, I already tried several boot-flag combinations like:
[-v -x -s]
[-v -x -s cpus=1 busratio=20 maxmem=2000 arch=i386]
but it keeps rebooting after I press enter.
My system is: CPU-Z Validator 3.1
Would be awesome if someone could help me for this issue.