Dimensions CM offers you two ways to reuse scripts.
Once a transition script has been defined, any other target in the build configuration can use the script. The Target page of the Create New Target Wizard contains a field named Reuse script from another target:
The pulldown list allows you to select a script that has already been written for another target in the build configuration.
You can also re-use a build configuration script as a transition script. Select Use the build configuration main script when creating a transition script.