Looking for Step by Step Instructions on Assigning a Delete Shortcut to Image from Filmstrip

What do you mean exactly? If you are indeed talking about Captivate, can you explain your request more in detail? You cannot delete an object on a slide when using the Filmstrip, it needs to be done on the slide itself in the editing environment. Which shortcut key? For deletion it is the Delete button on your keyboard.

I think you are going to need to explain in a little more detail. And could you point to an Instruction that you say is hard to follow.