I assume you do not have 3DXchange 7? If you do, you can import via 3DXchange and save as a prop.
You can then attach the prop to the character in iClone 7, which will make it an accessory.
You can then do as before, applying the weight map, etc., and then see how it behaves in iClone 7, which would tell you if it works as expected.
What is your ultimate goal with this? How are you going to use the CC4 character?