repeat subform dinamically
hi everyone! 
first of all sorry for my bad english 
i want to create a module that have 3 subforms (each in different pages) to create dinamically a document with units, chapters and pages:
subform 1 -> new unit
subform 2 -> new chapter
subform 3 -> new page
this subforms must be repeated properly:
for example, if i'm writing a new page and i want create a new unit, i want to add a new instance of subform "new unit" in a new page.
My problem is that the new instances of the subforms are created following the structure "new unit" , "new unit", "new unit"....."new chapter", "new chapter", "new chapter"...."new page", "new page", "new page".....,
but i want that the new instance of subform invoched by clicking the relative button to be inserted in the last page; for example:
"New unit"
"new chapter"
"new page"
"new page"
"new chapter"
"new page"
"New unit"
"new chapter"
"new page"
"new page"
"new page"
etcetera......
is it possible?
thanks for all
