-grml2iso allows you to create a multiboot grml ISO. You can specify
-two or more grml ISOs and will get one single multiboot ISO as a result.
-grml2iso requires and uses grml2usb for this task and installs grub2
-as bootmanager on the multiboot ISO.
+grml2iso allows you to create a multiboot Grml ISO.
+You can specify two or more Grml ISOs and will get one single multiboot ISO as a result.
+grml2iso requires and uses grml2usb for this task.
+
+Important
+---------
+
+The order of the provided ISOs matters for two reasons:
+
+1) order in boot menu entries: the first ISO specified is listed as first (default) option in the boot menu, further ISOs will be listed below as next options
+
+2) EFI image to be used: the EFI image for booting via (U)EFI will be taken from the last provided ISO.
+Therefore to be able to boot on 64bit EFI systems, you need to provide a 64bit ISO (like grml64-small or grml64-full) as _last_ ISO in the grml2iso command line.