+grml2usb provides multi-iso support, meaning you can specify several grml ISOs
+on the command line at once and select the grml flavour you would like to boot
+on the bootbrompt then. Notice that the default ISO (that's when pressing just
+enter on the bootprompt or wait until the timeout matches) will be the *first*
+one specified on the grml2usb command line.
+