PowerPoint add-on's to add sizzle to a presentation?

Hi! I have been tasked with taking our company’s main PowerPoint presentation into the 21st century (it was created in the 16th). One of the things that appeals to me is a non-linear approach. Create a main jump page that the sales person can jump to any page (topic) just by clicking a “hot spot” or miniaturized slide. I have also seen where you can zoom in on a slide. Pretty cool. I have looked at “Prezi” and, while impressed, don’t like the fee based structure or that I am tied to the internet. I have also played with “pptPlex” and like that too, but it is pretty raw. “Adobe Ovation” also looks pretty awesome.

Can you make any suggestions? Is there a cool PPT add on that would work well, or maybe some other software solution? I can’t rely on an internet connection for an effective solution, so I need software ON a PC.

Thanks!