You can add the contents of an Adobe Premiere 6.0 or 6.5 project, or the contents of a project made with an earlier version of Adobe Premiere Pro into an open Adobe Premiere Pro project, on Windows only. The imported project’s clips and sequences are added to the Project panel in a bin named after the imported project. The bin hierarchy of the imported project is maintained within its new bin. Discontinued transitions and effects are not maintained. Use caution when importing a project into another project with a different timebase or audio sample rate, because these differences may affect edit positioning and audio quality.

Importing a project into another project is the only way to transfer its complete sequence and clip information.

Also, you can open projects made with Adobe Premiere Pro CS3 for Windows, including any contents that may have been imported from earlier versions, in Adobe Premiere Pro for Mac OS.