I recently bought this software and used it to create amazing slideshows that I put on YouTube. If you are looking for a great tool, I recommend this:
Photodex Corporation
It is a bit pricey ($200) but I think it is worth the money. Putting your slideshows on YouTube will get you additional exposure and traffic.
This can be used by doctors, chiropractors, massage therapists, trainers, nutritionists and all others. You can create a nice sales pitch with a nice slow and your voiceover.
There is another one that I used:
DVD Photo Slideshow Professional from
Author of Photo DVD Maker, Movie DVD Maker, Video to 3GP Converter, DVD Photo Slideshow, Flash Slideshow Maker - the only thing is that when you render the slideshow it takes forever on slower computers. I have a dual AMD 64 and its fast, but on my other AMD 32 Athlon it was slow.
Let me know if you have any more questions about doing the slideshows for YouTube.