Prologue files and epilogue files enable you to control
  the DTM test environment. Both are command files that
  you create and associate with tests and collections.
  You use prologue files to set up test conditions before
  recording a test, running a test in a collection, or
  executing the collection as a whole. You use epilogue
  files to clean up or filter files after recording a
  test, running a test in a collection, or executing the
  collection as a whole.
  Tests, prologue files, and epilogue files execute in
  the following order:
  1. Collection prologue file
  2. Test1 prologue file
  3. Test1
  4. Test1 epilogue file
  5. Test2 prologue file
  6. Test2
  7. Test2 epilogue file
         .
         .
         .
  8. Collection epilogue file
1 – cre_coll_prols
You create prologue and epilogue files with a text editor. You must then identify the files to DTM. You can specify default collection prologue and epilogue files. All subsequently created collections invoke this file whenever DTM executes the collections. You can override the default specifications by explicitly specifying a different collection prologue or epilogue file when you create the collection. When you override the default collection prologue and epilogue files, you do so only for the newly created collection.
1.1 – cre_coll_def_pro
To specify default collection prologue and epilogue files when you create a library, perform the following steps: 1. Pull down the Library menu. 2. Choose the Create... menu item. To specify default collection prologue and epilogue files when the library exists, perform the following steps: 1. Pull down the Library menu. 2. Choose the Modify... menu item. In both cases, enter the names for the default collection prologue and epilogue files in the Prologue and Epilogue fields.
1.2 – cre_coll_spec_pro
  You can override the default collection prologue and
  epilogue files for a specific collection when you
  create the collection. Enter a new file name in the
  Prologue and Epilogue fields to override the default
  collection prologue and epilogue files.
  To associate prologue and epilogue files with a
  specific collection, perform the following steps:
  1. Pull down the Maintenance menu.
  2. Choose the Create menu item and the Collection...
     submenu item.
  3. Click on the Options... button.
2 – cre_test_prols
  To associate a test prologue or epilogue file with a
  test when you create a test description, enter the
  Prologue or Epilogue directory and filename into the
  field.
  To associate a test prologue or epilogue file with a
  test when the test description exists, perform the
  following steps:
  1. From the Test View, click on the test to be
     modified.
  2. Pull down the Maintenance menu.
  3. Choose the Modify menu item and the Test... submenu
     item.
  4. Click the button for Prologue and/or Epilogue
  5. Type the directory and file name into the Prologue
     and/or Epilogue box
  Test prologue and epilogue files are executed whenever
  DTM records or executes the test.