Hi Ron, things that look like one big melty fluid object can tend to be easier to construct in a sub-d modeling program rather than in a CAD program just in general.

For doing it in MoI you would probably be looking at using Blend a lot to create smooth connecting surfaces between different pieces, it's a pretty advanced type of modeling though and has a higher learning curve than doing construction of more mechanical shapes though.

Check out some of Mike Maynard's tutorials for some help on some of the techniques involved:
http://www.k4icy.com/tutorials.html

- Michael