Replacing Corridor Horizontal Alignment

I have a horizontal and vertical alignment for a roadway in one file and the associated corridor in another file.  The file that contains the alignment somehow became corrupt (I get a critical error every time I try to adjust the profile), so I would like to create a new geometry file and associate the corridor to that new file and alignment.  Could someone explain how to do this?

GEOPAK SS3 - 08.11.09.493


Thanks in advance!

Matt