I would install the latest ViewNX2 and not try to use Transfer 1.5.3. I haven't heard of problems with the D3s and Tr 1.5.3 but I think it would be safer to update to the latest version of ViewNX2. Incidentally if you haven't updated CNX2 you should do that also. If you're still using the version compatible with your D70 and haven't updated since the D3s was released, you won't be able to use CNX2.
Hope this helps. Incidentally in the future, I would suggest a new post for questions like this. With a long thread like this it's easy for your post to get lost.