Powerpoint with bells on

I want to produce a series of 4 short, say, 3-minute powerpoint presentations for viewing on my website, geared to different audiences. I would provide the wording copy for the slides, and some images - open to other suggestions.
I would need to record a voice over of my voice, talking through the content of the slides. Background music might be good. Not sure - need advice.
2 of them would ideally incorporate 'how to' slides with the mouse hovering and clicking - like an online training, so showing website visitors how easy it is to do x or y.
Audiences: 1) working people; 2) Employers/HR managers; 3)careers advisers; 4) potential corporate sponsors.