1. USAGE SYNOPSIS 

isol2grub [-i/nit] [-b/ack] [-p/refix title_prefix] [-k/ern kernel/initrd path] [/path/to/isolinux.cfg]

2. PARAMETERS 

-i: init the generated menu.lst at the top with standard settings
-b: put the entry "Back to the root menu" at the end
-p s: prefix string for title
-k s: path for kernel/initrd

3. EXAMPLE 

isol2grub /boot/isolinux/isolinux.cfg
cat /boot/isolinux/isolinux.cfg | isol2grub

Check out detailed isol2grub usage examples for further explanations.