chuckebaby
1- Right click / lasso all tracks.
2- Once they are all highlighted, grab 1 track and drag it to the desired location.
This method will not move Markers and Tempo changes, which leaves a lot of manual cleanup.
...wicked
I would select the empty space from 0:00 to the start of the song and use the Delete | Delete Hole command with everything ticked.
This method will not work, because Delete Special... requires that data exists in the hole for every track that must be moved.
Since you are moving the entire arrangement and I am assuming that includes the Markers and Tempo changes, I recommend that you do the following:
1. Save the current version.
2. Lasso select all clips in the arrangement and verify that the start of time selection starts at the beginning of the existing arrangement and not before it.
3. Select Edit > Cut Special.. from the main menu. Check everything in the Cut Special dialog except Delete Hole, and click OK.
4. Verify that the Now time is at 1:01:000.
5. Select Edit > Paste from the main menu.
Hope this helps,
-- Ron