grub dynamique

J'ai trouvé le site suivant en anglais pour faire un grub dynamique http://www.rmprepusb.com/tutorials/autoiso ça m"a paru pas mal mais ça marche pas.
j'ai modifié mon menu.lst ainsi:

 # /boot/grub/menu.lst: GRUB boot loader configuration.
 #
 # By default, boot the first entry.
default 0
 # Boot automatgrub dynamiqueically after 8 secs.
timeout 1
 # Graphical splash image.
splashimage=/boot/grub/BlueLight.xpm.gz
 # Change the colors.
 #color yellow/brown light-green/black
 #enable parttype output
debug 1
 # make empty table entry in 4th position in ptn table
parttype (hd0,3) | set check=
debug off
set check=%check:~-5,4%
if "%check%"=="0x00" partnew (hd0,3) 0 0 0
if not "%check%"=="0x00" echo WARNING: PTN TABLE 4 IS ALREADY IN USE! && pause && configfile /menu.lst
debug 1
 # slitaz GNU/Linux 4.0 (Kernel vmlinuz-2.6.37-slitaz)
title SliTaz 4
root (hd0,6)
kernel /boot/vmlinuz-2.6.37-slitaz root=/dev/sda7 quiet 
 # kubuntu
title Kubuntu
root (hd0,5)
kernel /boot/vmlinuz-3.13.0-24-generic root=/dev/sda6 quiet
initrd /boot/initrd.img-3.13.0-24-generic
title LINUX ISOs (sans commentaires)
debug off
checkrange 20120114:-1 read 0x8278 || echo WRONG VERSION OF GRLDR (grub4d0s)!!!! && pause
set LBACKMENU=(bd)/menu.lst
call /grub/autolinuxmenu.bat .automenu /_ISO/Linux
configfile (md)0x3000+0x50
 title LINUX ISOs (avec commentaires)
 #please see www.rmprepusb.com Tutorial #96 for instructions
 # avoid debug messages
 debug off
 #checkrange 20120114:-1 read 0x8278 || echo WRONG VERSION OF GRLDR (grub4d0s)!!!! && pause
 # call the RUN batch file and create a configfile in the ramdrive for all image files
 # if DD=1 then echoes debug statements
 # set DD=1
 # if ELBACKUP=YES then writes the finished menu to /grub/LINUXBACKUP.lst (but doesn't work under an emulator)
 # set ELBACKUP=YES
 # Search all folders under MFOLDER for ISO files...
 # set MFOLDER=/_ISO/Linux
 # Set name of the menu to go back to (last menu item)
 set LBACKMENU=(bd)/menu.lst
 # now generate the new menu.lst file and specify the Main Folder that will be scanned for .mnu files
 call /grub/autolinuxmenu.bat .automenu /_ISO/Linux
 # echo show menu && cat (md)0x3000+0x50 && pause
 # Load the new configfile
 configfile (md)0x3000+0x50

(J'ai essayé les deux avec et sans les commentaires)
ça bloque et me met:

 #checkrange 20120114:-1 read 0x8278 || echo WRONG VERSION OF GRLDR (grub4d0s)!!!! && pause 

Pourtant j'ai bien grub4dos