I'll have to refer you to John Grinder and Carmen Bostic-St. Clair's Whispering in the Wind for that before I plant my foot deeply in my mouth.
The book is very much about the distinction between content and form.
I think they do address submodalities in the book. I think submodalities can be used as a description of form.
You put the content in one form of submodalities and then another and you get two totally different experineces.