Sometimes you have to offset a simulation in time once it is done, to say,
you make your demolition starting in frame 0, you agree with the result but
eventually you decide it is better to start in frame 50, without having to recompute all the stuff again; No problem with this, it is very easy to offset simulations with PDI, simply by exporting/importing the animation curves.

This is the procedure for Maya:

1) Export the keys using the AnimImportExport plugin.
Load the AnimImportExport plugin, select your geometry objects in viewport
and select “Export Selection” from the File menu. Select the “AnimExport” option in the file type dropbox.  Click the “Export” button to export the animation data.

2) Delete all keys from selection and save the scene with a diferent name just in case.

3) Load the animation data into the new scene.  Select “Import” from the File menu then  select the “AnimImport” option in the file type dropbox., setting the options “start” and “startframe” in the AnimImportExport window.

and  for 3D Max:

1) Export the animation keys. Select your geometry objects in viewport and click on Main menu->Animation->Save Animation.

2) Delete all keys from selection and save the scene with a diferent name just in case.

3) Import the animation keys, using the “Load Animation” option in the Max File menu. Choose  “insert” and type the desired frame in “at frame” in the Load Animation settings.