I sorted it simply with a MSDOS boot floppy. Little bit low tech but worked.
I believe that there is a problem with the makeusb script
I have tested it on several computers and I always get the same error message EBIOS LOAD ERROR ...
Maybe it will work on some computers but not on any of my Dells or Asus computers.
So what I had to do was to change the makeusb.cmd script so that the command to get the usb bootable is executed after copying the files. Maybe it will work on some computers.
Maybe something to consider in a future version of Ultimatebootcd
echo UBCD2USB: Creating bootable UBCD memory stick ...
if not exist "%a1%\ldlinux.sys" %0 : _error Missing file '%a1%\ldlinux.sys'
echo UBCD2USB: *WARNING* YOUR USB KEY IS ABOUT TO BE REFORMATTED!
echo UBCD2USB: *WARNING* YOUR USB KEY CONTENTS WILL BE LOST!
"%~dp0\wait" Press any key to continue, press ESC to abort
if errorlevel 27 if not errorlevel 28 goto _skip
echo UBCD2USB: Formatting USB KEY...
format "%a2%" /V:UBCD /X
if errorlevel 0 goto _gomkbt2
%0 : _error 'format.exe' failed
echo UBCD2USB: Copying files to USB KEY...
xcopy "%a1%\*" %a2% /S /H /R /Q /Y
if errorlevel 0 goto _gomkbt3
%0 : _error 'xcopy.exe' failed
echo UBCD2USB: Making USB KEY bootable...
"%~dp0\syslinux" -ma %a2%
if errorlevel 0 goto _gomkbt4
%0 : _error 'syslinux.exe' failed
echo UBCD2USB: Bootable UBCD memory stick has been created