Highlight the regions/files you wish to move to another session.Select "Time Stamp Selected" from the Audio Menu (above the Region Bin) and set a User Time Stamp to the desired postion in time.With the regions/files still selected, choose "Export Region Definitions" from the same Audio menu.Import files into the new session and use Spot mode to select the User Timestamp.The Original Time Stamp will not be retained.If you have a large number of regions in each track, then you may consider using 'Considate Selection' from the Edit menu.