Break Horizontal & Vertical Geometry ?

I have a 7-mile-long project with one horizontal geometry and one vertical geometry.  We want to break the geometry in to two sections. Two different Geometry projects.  Is there a way to do this without losing the vertical geometry?  I am able to Simplify the geometry down to the base elements in the profile, then delete all the segments before the Break point then re-complex.  Then I am able to break down the horizontal and do the same to the base elements but that disassociates the Profile from the new Complex Horizontal geometry.  Everything I do seems to mess-up the Vertical geometry.  I have tried Trimming the horizontal and vertical but that messes up the vertical Stationing.