loop subsurface command/script for non complete loop edges

I wish to know if there is any fast way to do what is described at
Sub-Division Primer
in chapter 4.10 at bottom of the page.
Should be similar to the edge loop function but selecting one or more
cuncatenated edge should create the fake tris polygon (which is a quad) for
the starting and ending point of the chain of edges, and cut the 2 columns/rows
of polygons adjacent to the chain in 2.
If there isn’t, please point me to any feature request page, as I think this could greatly
speed up subsurface modeling and givin user a fast and correct
way to add details to a subsurface mesh (if you use subsurfaces please
comment my last phrase).