Re: slideshow and collage creating software
what do you mean there "edit them with your own music"?
Picassa doest seem any different than iMovie to me. but these softwares take load of time in rendering.
the things you have to do can easily be done on powerpoint. dont forget powerpoint is easily accessible everywhere.
p.s. last year i have seen some really great stuff people made on Power Point. and i am talking around 300 slides.
but lets see what other people gonna suggest.