My initial attempts at executing initfs_flash were in fact failing with the message stating "Cannot find initfs.bootmenu.jffs2, something failed, nothing flashed."
Following this, I restored my previous (2007) MyDocs/.documents directory, and then I was able to effect what I though was a successful establishing of my bootmenu.
But it doesn't work, and now I'm going to have to reflash a third time!
Will I have to abandon my mmc clone? Thanks and regards, Jim