Sam,
The ASCII sort would simply move right and sort on the first character of the song title. I don't mean to name the song "_" but "_samssong1.mgu" etc. It will keep it toward the top of your song picker list. You should be able to find your 'work in progress' easier. Of course, you would want to rename it Sams Song 1 when it is finalis(z)ed. Its just a trick to keep selected songs on top of the list.