Adding Spice activities to Captivate can be achieved one of two ways:

My favorite: Use a button:

1. From the Insert menu, click Button.

2. Next, set the On Success option to Open URL or file. Paste the url for the hosted activity in the Open URL or file field.

3. Finally, set it to open in a new window by clicking on the arrow next to the url and selecting New.

Your activity will now launch from captivate.

 You can also do this using a click box.