Slideshows in iPhoto

It was my mother-in-laws birthday - I was given the job of slideshow.
I went with iPhoto - and used ComicLife for some extra annotations.
These links were of use in working out how:

http://www.macworld.com/article/54292/2006/12/jandigitalphoto.html

http://www.ehmac.ca/anything-mac/50844-keynote-slideshow-imovie-idvd.html dddd

and especially this from teachertube http://www.teachertube.com/view_video.php?viewkey=bcfe8450a1a41c200364