Back in your console window, execute the following (feel free to replace nano with your console text editor of choice):
{{Code| cd /usr/share/amahi-netboot/tftp/pxelinux.cfg/ nano default}}
At the bottom of the file, paste in the following:
{{Code|<pre>LABEL ubcd
MENU LABEL Ultimate Boot CD
KERNEL menu.c32
APPEND images/ubcd/menus/main.cfg}}</pre>
Make sure there aren't any "." or other characters at the beginning or end of that block once you've pasted it; occasionally text copied from this wiki suffers from this. If you've done it correctly, the file should look something like this: