Jeremy_D, thx for your response,

Well, thats a bit of a dissapointment that we will have to code to use the Newton physics as well as the Havok pysics engine.
We were looking for a tool which can gives us functionalities like drag and drop behaviours as like in Macromedia Director.
We dont mind to code a few lines but if exceeds into coding for complex physics models we will be out of the scope.

Can anybody suggest here how easy it would be for a developer coding in 3d lingo of director to understand the code for using Havok and Newton physics engine, and also which is the most preferable physics engine Havok or Newton?

Hoping to get some good news.