You will find a file called syslinux.cfg in the root directory of your bootable USB stick. If you use Windows open this file with wordpad. If you are running Knopix use Leafpad text editor.

Search for a section with 'menu label knoppix' like the following:
Code:
label ubnentry2
menu label knoppix
kernel /boot/isolinux/linux
append initrd=/boot/isolinux/minirt.gz ramdisk_size=100000 lang=de apm=power-off  nomce libata.force=noncq hpsa.hpsa_allow_any=1 loglevel=1 tz=localtime
Move the cursor to end of the line starting with 'append' and add your cheat code there. In my case the new line looks like
Code:
append initrd=/boot/isolinux/minirt.gz ramdisk_size=100000 lang=de apm=power-off  nomce libata.force=noncq hpsa.hpsa_allow_any=1 loglevel=1 tz=localtime modprobe.blacklist=rtl8192cu
Save the file and reboot.