Vistamare Trainzmap does a number of useful things.
Firstly it provides a printable map view of a route, you can select which features of a route to show (junctions, signals, trackside labels and so on).
Secondly it allows the replacement of track KUIDs in a route either locally or throughout a route.
It can be accessed from within TRS 2006 (icon at bottom of screen) or as a stand alone program.
The first time you start it up it takes a while to scan all installed routes but afterwards works quickly and well.
Regards
Chris