Hay BBOwne,
The Expansion packs do work with G4. All four Expansion Packs will have to be re-installed into G4...and when you up load the Expansion Packs into G4, you will have a choice to load them into G3.5 or G4.

It's the five first Add Ons that do not work as yet with the new soft ware. I was told that they may be able to get the first five Add Ons to work with G4, but as now, they will not.

Soft Landings always,
Bobby of Maui