iPhoto slideshows How to play successive slideshows

[blurij]

Hi,
I have iPhoto09 on my macbook pro.
It is fun and easy to make instant slideshows. That isn't a problem.
I want iPhoto to show slideshow after slideshow randomly not just one at a time or have one play over and over. For example, let's say I have one slideshow with flowers, another with animals, another scenic , etc. - can I get iPhoto to select from a list of slideshows and display them randomly.

Could it also be done with photo albums that have not been made into slideshows - just having iPhoto select themed albums randomly and playing them in a random order as well as showing the individual pictures in each album randomly? In other words, I would want to make a separate list of albums I select and iPhoto would select the albums randomly from my list and also choose the pictures randomly within each album - and then when it is through the whole list recycle them again.

Can this also be done with iMovies I make? How is it possible to show one iMovie after another automatically and randomly? Can one mix short iMovies and iPhoto slideshows and just have them on constant display?

Perhaps one has to get a 3rd party application for what I have in mind.

My purpose is to designate an older iMac as a digital photo frame.
I do appreciate any help you can give me .