Victoria_Lee, do you have the texture expansion pack as well? That may explain the other versions you have.  I have only the Bath Base, Bath complete and Temple Complete files in my install as well. However, when I load the complete items the whole lot loads for me.

WildHunt1, have a look in the geometries->Marforno->GreekBath folder to see if you have the following .obj files:
Base, Bath, BenchE, BenchN, BenchS, BenchW, ColumnsE, ColumnsN, ColumnsS, ColumnsW, Floor, GargoyleFull, GridsDecorations, Ground, Pedestal, SurroundingWall, Templetto, TemplettoBase, Vase and WaterObject.

Also, 2 .pz3 files are included which also load the complete scenes, try loading them, they are located in Runtime->DM Production Pz3's->Greek Bath folder.

If you don't have all of those, I would suggest redownloading the GreekBath from DAZ in case you had a corrupted download before.